when 2 or more pc gamers sit in the same physical area to play pc games, most commonly fps\'s.
it\'s bring your own pc, hub/switches are normally provided. headphones are required (defeating the purpose of a social environment)
most times, they are quite organized and sponsored if a large number of people will be there. they can get in the hundreds, and even thousands
i\'ve been to a few in the past, and they sucked. too many kids that think they\'re internet tough guys cause they are good at counter strike. or they wanna argue all night over which game/map to play instead of just playing one.
the 21+ ones are slightly less annoying as drinking is encouraged.