The venue is a part of the connecting Boston Arms pub, that was constructed on the corner of Dartmouth Park Hill and Junction Road in 1881.

[5] In 1909, the swimming pool was converted into a second assembly hall and used as a cinema, called the Electric Theatre, opening in June 1909.

The two spaces have seen a whole host of acts perform throughout the years such as Coldplay, Bring Me the Horizon,[6] Blur,[3] Primal Scream, Noel Gallagher,[3] and many many more.

During this time the venues branding was refreshed, with the Boston Music Room being renamed as Downstairs At The Dome.

A documentary about the event and refurbishment was published to Amazon Prime in December 2024 called ‘'Unsigned: Backing The Dream'’.