Too many people ruins the product and breaks the rules. A room designed for twenty is unpleasant with thirty and unsafe beyond that, so entry has to be counted rather than estimated on a busy Saturday.
Testing is a record, not a routine. Water quality, temperature and hygiene checks are logged with dates because an inspector or an incident will ask, and a clipboard nobody filled in is worse than nothing.
The timetable is a promise. A ritual advertised at seven has to happen at seven with somebody trained to run it, and a session cancelled because nobody was rostered is remembered for months.
Two kinds of customer share the door. A member paying monthly and a visitor buying one entry need different pricing, different access and different reminders, and treating them alike loses both.