Accidental Theatre is an independent arts venue at 12–13 Shaftesbury Square in central Belfast (BT2 7DB) — a refuge for collaborative work spanning theatre, music, art, dance and unclassifiable live performance. The main theatre seats around 100 (plus a 30-capacity Book Bar), and the venue runs a monthly experimental music night of short sets with room to chat and move, alongside gigs, comedy and theatre. It also hosts Cosmic Jam, an open mic with a full backline of instruments and mics. A flexible, artist-led black-box space welcoming to original and emerging performers.
Belfast · Every 3rd Thursday of the month · £6.00
Accidental Theatre Open Mic
Belfast open mic at Accidental Theatre — listed on Google Places. Schedule details below are pending venue confirmation; check the venue's own listings before turning up.
Next night: Thu 19 Nov. Kick-off 19:30, sign-up from 19:30. 10-minute slots. £6.00 entry.
Nearby open micsUpdated 13 November 2026
At a glance
Checked 25 Oct 202619:30
Kick-off
Thursdays
sign-up from 19:30Thursdays
| Night | Every 3rd Thursday of the month |
| Sign-up | 19:30 |
| Slot | 10 min |
| Entry | £6.00 |
| Backline | Full backline |
01 — Inside the room
4 photosPhotos: Google
165
page views on GigXchange. Is it your night?
0 members voted to bring the venue onto GigXchange02 — The details
Before you goEverything you need to know
0
Member votes
votes to get this venue on GigXchange
| Capacity | – |
| Performer types | Musicians |
| Website | accidentaltheatre.co.uk |
The check
| Status | Verified running |
| Last checked | 25 Oct 2026 |
| Checked against | Venue website |
03 — The night
Every 3rd Thursday of the monthHow the night runs
19:30
Kick-off
ThursdaysRunning order
19:30 Kick-off· 10-minute slots
23:30 Close (tbc)
Times marked tbc aren't confirmed yet - we're working to find out.
04 — Find Accidental Theatre
BelfastGetting there
12-13 Shaftesbury Square,
Belfast BT2 7DB
Belfast BT2 7DB
05 — What's on stage
5 provided · 2 TBC| PA system | Provided |
| Drum kit | Provided |
| Guitar amp | Provided |
| Bass amp | Provided |
| Keys / keyboard | TBC |
| Vocal mics | Provided |
| In-house engineer | TBC |
06 — About
BelfastAbout the night
Accidental Theatre's Cosmic Jam is a wonderfully chilled, experimental open-mic-and-jam night, held monthly on a Thursday (the next dates are the third Thursdays, 19 November and 17 December) and starting at 7.30pm (BYOB) at their Shaftesbury Square home. It's built for experimentation: there's a full backline of instruments and mics in the room, so bring your own or use the house kit, slots run 10 minutes or less, and there's space to jam with whoever else turns up. A performance slot is £6, booked online in advance as a ticket, which supports the theatre and the event. Age guidance is 16+. The team record every set and send you the video afterwards.
Accidental Theatre is an independent arts venue at 12–13 Shaftesbury Square in central Belfast (BT2 7DB) — a refuge for collaborative work spanning theatre, music, art, dance and unclassifiable live performance. The main theatre seats around 100 (plus a 30-capacity Book Bar), and the venue runs a monthly experimental music night of short sets with room to chat and move, alongside gigs, comedy and theatre. It also hosts Cosmic Jam, an open mic with a full backline of instruments and mics. A flexible, artist-led black-box space welcoming to original and emerging performers.
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Belfast · Every 3rd Thursday of the month · £6.00
Accidental Theatre Open Mic
Belfast open mic at Accidental Theatre — listed on Google Places. Schedule details below are pending venue confirmation; check the venue's own listings before turning up.
- Thursday
- Open mic night
- Apr 2026
- Listed since
- 25 Oct
- Last verified
- £6.00
- Entry
- 10 min
- Slot length
- Verified
- Listing status
Run a Belfast open mic? List it free — reviewed before it goes live
Last updated: 13 November 2026
Accidental Theatre Open Mic — Quick Facts
Accidental Theatre Open Mic runs on the 3rd Thursday of the month at Accidental Theatre in Belfast, starting at 19:30 with sign-up from 19:30. Below: when it runs, sign-up and slots, the stage kit and how to get there.
Open mic status Last verified 25 Oct 2026
How sure we are
Verified active
Checked against the venue’s own listing See Accidental Theatre’s venue page →
Music starts around 19:30. Sign-up is online, in advance, from 19:30. Slots run about 10 minutes. With full backline listed, you need little more than your instrument and pedals.
Next nightThu 19 Nov · 19:30Starts in 6d 11h 52m
Entry£6.00
Age18+
Sign-upOnline, in advance
BacklineFull backline
Sound engineerAsk the venue
Directory statusVerified active
Member votes0 to get the venue on GigXchange
Websiteaccidentaltheatre.co.uk
How do you rate this open mic?One tap, no sign-up required.
Spotted something wrong with this listing?Closed, moved night, different start time? Let us know. We review corrections within 7 days.
NightThursdayEvery 3rd Thursday of the monthNext: Thu 19 Nov
Starts19:30start time
Sign-up19:30Online
Slots10minutes each
What’s on in Belfast this week — or see what’s on across the UK.
About This Open Mic
Accidental Theatre's Cosmic Jam is a wonderfully chilled, experimental open-mic-and-jam night, held monthly on a Thursday (the next dates are the third Thursdays, 19 November and 17 December) and starting at 7.30pm (BYOB) at their Shaftesbury Square home. It's built for experimentation: there's a full backline of instruments and mics in the room, so bring your own or use the house kit, slots run 10 minutes or less, and there's space to jam with whoever else turns up. A performance slot is £6, booked online in advance as a ticket, which supports the theatre and the event. Age guidance is 16+. The team record every set and send you the video afterwards.
What's on stage — equipment and backline at this venue, verified regularly.
PA systemProvided
Drum kitProvided
Guitar ampProvided
Bass ampProvided
Keys / keyboardTBC
Vocal micsProvided
In-house engineerTBC
The Night at a Glance
How Accidental Theatre’s Thursday night runs.
Next nightThu 19 Nov · 19:30Starts in 6d 11h 52m
Sign-up opens19:30Online, in advance
Kick-off19:30Every 3rd Thursday of the month
Music endsTBCNot confirmed yet
Venue closesTBCNot confirmed yet
Slots10minutes each
How often
Every 3rd Thursday of the month
Coming up
Thu 19 Nov · Thu 17 Dec · Thu 21 Jan
Kit
Accidental Theatre provides a PA system, vocal mics, a drum kit, a guitar amp and a bass amp — check the rest with the venue.
First time here?
Book your slot online, in advance, then arrive in time for 19:30 with a set that fits 10 minutes.
Find Accidental Theatre
12-13 Shaftesbury Square, Belfast BT2 7DB
Address12-13 Shaftesbury Square
AreaBelfast
PostcodeBT2 7DB
DirectionsOpen in Google Maps →
Getting there
Accidental Theatre is in Belfast — use BT2 7DB for sat-nav, taxis and ride apps. Check the venue's website for parking and the nearest station before you set off.
Open mics nearby
Oh Yeah Music Centre, Denvir's Coaching Inn, The Second Fiddle and The American Bar
Planning Your Thursday Night
Book your slot online, in advance, then arrive in time for 19:30. Entry is £6.00. Full backline is provided — just bring your instrument and pedals.
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Common Questions
8 things people ask before turning up at Belfast's Accidental Theatre open mic.
Sign-up via online. See all Belfast open mic nights.
Full backline: drum kit, guitar amp, bass amp, PA and vocal mics. Bring your own instrument and pedals.
10 minutes per act — typically 3 songs solo.
Entry is £6.00. For free alternatives, filter the directory.
Yes — full bands welcome and the backline is set up for it.
12-13 Shaftesbury Square, Belfast BT2 7DB.
Mostly fellow musicians, friends and Belfast regulars across the Belfast open mic scene. Belfast open mic crowds tend to listen attentively.
Sign-up is online, in advance. GigXchange doesn't publish venue phone numbers or emails - the venue's own website is linked on this page. Browse other Belfast open mics.
Venues Near Accidental Theatre
No other gigs are listed at Accidental Theatre in the GigXchange directory yet — these are the rooms around it, their size, kit and live nights.
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Accidental Theatre open mic in brief. The Accidental Theatre open mic runs every 3rd Thursday of the month from 19:30 (£6.00 entry); sign-up opens 19:30 and slots run about 10 minutes. Accidental Theatre’s venue page lists its kit and capacity if you want to come back with a full band. For another night this week, the open mics near Belfast are listed by day.
Booking or playing in Belfast? The GX Index publishes what UK gigs actually pay, by city, band size and venue type, and the GX Index reports set out the methodology and the sample behind every figure. Both are free to read and free to cite.
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09 — More Belfast open mics
All ›Looking for paid gigs, not open mics? See Belfast gigs or check the going rate.
10 — Venues near Accidental Theatre
All ›More rooms near Accidental Theatre: Bullitt Hotel, Denvir's Coaching Inn, Empire Music Hall, Errigle Inn, Fibber Magees, Fountain Lane, Granny Annies Kitchen, Haymarket Belfast, Henry's, Kelly's Cellars and Kitchen Bar.
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