Another use for interior rooms could be meeting/ conference rooms/ teleconference/ coworking spaces. Some premium apartment landlords currently have these in their clubhouses, usually reservable by the hour, residents usually get so many free credits a month.

Is this a thing, in planned conversions? If the pricing varied by day and time, or was dynamic, it could work very well. With secure lockers adjacent. (Would that require mixed-use zoning?)

A teleconference room (/remote classroom) by day could be time-multiplexed into a cinema room off-peak (with some compromise in seating plans), leasing company just needs to handle cleaning deposits and video surveillance at start and end to check users keep it clean.