"It is easy to dismiss video games as pointless activities that only teenagers indulge in. The truth is that the average age of MMORPG players is around 26. In fact, only 25% of MMORPG players are teenagers. About 50% of MMORPG players work full-time. About 36% of players are married, and 22% have children. So the MMORPG demographic is fairly diverse, including high-school students, college students, early professionals, middle-aged home-makers, as well as retirees. In other words, MMORPGs do not only appeal to a youth subculture."

http://www.nickyee.com/daedalus/gateway_demographics.html