A CAVE ROOM!!!!
The entire room covered in chicken wire and paper mache to make it look like the inside of a cave, with shelves and storage spaces built into the "rock" walls, and a small pool in the corner with a waterfall that trickled out of the wall about chest height, and atmosperic lighting hidden in nooks and crannies, and a beer fridge hidden inside a boulder, and bean bags that looked like piles of rocks but were really comfy, and an lcd tv in one of the walls that was covered by more "rock" when not in use, and the door would be made to blend in so that when it's closed you can't see the way out, and weird looking crystal balls on the stoney shelves and candles which have dribbled wax a LOT and and and.... a small gnome that says it's ok to say everything in only one sentence if that's what you want to do.