This is normally on the last Monday of every month at 7.30pm (doors and bar open 7pm). It’ll appear in the What’s On listing here, and you can book tickets at wegottickets.com/ashburtonarts (+10% fee) or email email@example.com to reserve and pay on the door.
It’s organised by local bass player Mary Caffrey, and normally starts with a set each from a SW-based band or artist/duo. The third set is a blues jam session open to anyone. If you’d like to play, you can just turn up, or ideally, contact Mary in advance on firstname.lastname@example.org.