Besides things like dining room, study, kitchen and living room I also added other - which in this case is a members only pub/brewery, that some of my gaming friends have access to.
You know, when we bought our new house, we specifically got it with a big game room upstairs, with big wide windows and an open feeling and everything.
Almost two years later, we still use the Dining Room, for any number of reasons:
Its downstairs
Its the biggest table in the house (with extra leafs)
Its closer to the kitchen/drink fridge
Ah well. Best laid plans and all that. We finally gave up the ghost and redecorated it, and now its more a study/game library than an actual game room.
Master bedroom (well, the only bedroom in my 1-bedroom apartment). My group games online using kLoOge.Werks and Teamspeak. What rooms the others are in, I couldn't tell you.