An upgrade arrives to deal with the blood, and a raptor with the zoomies undoes its work in real time.
The room the party comes back to is the one they left: floor, walls and ceiling coated in congealed ghoul blood from the station 36 incident. The 25,000-gold Cleaner Bot goes to work the instant they cross the threshold, and by the time everyone has showered it has managed the kitchen counter and little else. Katia Grim eats a pineapple at the one clean surface as though nothing has happened; Mongo sprints through the rest of it flinging fresh droplets.
The crafting room attached to it changes more than the dining area does. While the party sleeps off its buffs, Mordecai rearranges the whole thing: he installs the Repair Bench Carl salvaged, buys three more benches — two with the party's table upgrade coupons and one with gold — adds a second Alchemy Table so one can be specialised, a Metalworking Table whose purpose he declines to explain yet, and a Bolt-Thrower's Workshop for eventual mass production of explosive crossbow bolts.
Blood-slicked walls with one gleaming stretch of kitchen counter, and a crowded new workshop through the door.
The party's home and workshop for the last day and a half of the fourth floor.
Also appears in books you've already read — spoiler-safe to their endings: