Well...here's my game room. Admittedly, it's geared for the solo player.
I have a few posters (two Atari 2600 catalogs), my PC (for my SIO2PC cable for the Atari 8-bit), barrister shelves (great for keeping away dust), and catridge drawers.
I haven't updated my page's information in a while, though. The room is now reversed (the TV is now on the right side of the picture), I've narrowed down my classic collection to 2600/5200/7800/8-bit, Intellivision, and ColecoVision (the O2 and Commodore hardware is gone, but I still have a PlayStation and my beloved Dreamcast), I have multiple classic systems as backups, and I have quite a few more cartridges that are now all individually bagged.
I did block the lower half of my windows with black construction paper to cut down on the sunlight in the room. It's still "light enough" to play games in.
I may do some strategic rearrangement of my house this winter. Because of poor insulation I may move my bedroom into this game room (it's in the middle of the house, so its warmer), move the game stuff to the dining room/living room area, and close off my back room (currently my bedroom).
Voch