Doors on the floor.
Doors on the ceiling.
Doors tucked behind panels and windows and floorboards - every available space within the sprawling mega-compound known as CARE-INN is yet another private suite, club room, or health center for those nearing the end of their mortal time in any dimension. Care bots, nearly-corporeal AI visitors, and legitimate ghosts wander, caretaking and giving companionship to those who spend retirement or hospice here. It has everything you need!
This is a companion discussion topic for the original entry at https://rpg-trader.com/products/5268/care-inn-a-slugblaster-dimension