Smells kind of sweaty. I literally just walked through the door from a gig and my clothes were completely soaked through. My light blue jeans are now two shades darker.
Normally it smells like whatever the outside smells like, because I generally don't use air freshener, I just open the window and door and let the cross breeze do its thing.
EDIT: Sorry, missed the game part. Uhm, probably smells like Guitar Hero, guitar strings and sweat smell mixed with cigarette smoke and Jack Daniels.