From the Super Mario Wiki
The Billiards Room (Japanese: 娯楽室 Recreation Room) is a location found in the third area of Luigi's Mansion.
The Billiards Room's main point of interest is obviously the pool table. There is also a dartboard, a chess set, and two small drawers. This room is also one of only two rooms with a ceiling fan, the other being the Master Bedroom. There is a Speedy Spirit in the chair at the southeast corner of the room. However, it can only be caught when Slim is present.
Ghosts in the Billiards Room
Ghosts in The Billiards Room during the blackout