I want to leave some suggestions/ideas.
1. Long hallway + curtains covering sum windows or paintings. The curtain works as a locker mechanic.
2. Rarer lewd options like elevator works as a locker but sends the person on a different floor smth like that.
3. School Dorms or empty classroom that can be used as a locker mechanic. Also maybe add a little challenge for the game like: adding a teacher ( don't get caught by them)(Can track previous lockers after seeing a used student walking away from the locker)(Can catch you if seen catching students or releasing them)(spawn rate each room 2)(can be tentacled too, if ya know ya know)