I woudl recommend telling your players to add a "key lock" to the items in the room.. they can lock up and leave any unwanted guest in there... When a new renter rents the keylocks will get removed
Merged postOr add another doorframe inside and allow players to make an airlock
Merged postthe only way i can see accomplishing this would be to make each room a "zone" and limit who can enter the zone but you would really need to be careful of room spacing at that point.. Ill keep note of your request if i can solve it I will try