If we’re discussing re-purposed cinemas there’s the old Coronet on Holloway Road. Originally an ABC called the Savoy, opened in 1940
Then it later became a Coronet in the 70s

and closed in 1983. I recall it being a terrible, cold cinema and the Odeon up the road was always preferable so no wonder it closed. Afterwards it became a urine-soaked snooker hall:

before Wetherspoons finally bought it and put it out of Holloway’s misery. It’s really nice on the inside now.
(Did once have an old guy ask me where the ABC cinema was in the 2000s but we quickly established he was just after the Odeon.)