I own a nightclub in Salt Lake City (Area 51) and have thought about this idea for a long time. For it to be successful, a broad spectrum of games would need to be available for play. My concept was pool, darts, casino games, RPG's, board games, and a LAN with wireless access.
I am considering Sundays, since the other nights of the week are busy. It would be limited to 18+ due to the laws here, but we would have beer, full liquor, some food, sodas (especially Mt. Dew), coffee, water, etc. available.
What other items do you think would have appeal?