They usually just clean and paint the rooms and sometimes use the downtime as a chance to restage some things. For example, I know in the treasure room, the skeleton sitting on top of the pile has been changed a couple times. Several years ago, he used to hold a cup that had fiber optic lighting in it to make it look like it's sparkling. But he has not had been holding anything up until this past rehab. But usually minor things like that. Also it's been said in the past that all the treasure in that room is taken out and cleaned and put back in, usually staged just a bit differently.