In all my many visits I never realised there was anything on the 3rd floor other than changing space for the boys. Lots seemed to go up there after their their stint in the shows and after. I expect there may have been short time rooms. If so, the waiters never advertised them to my group.
Loved Apollo. First visited in 1980 and was a regular until either it closed or I happened upon Twilight and Barbiery.