Just an FYI, if you do hit 200-300+ attendees, you'll get tons of sponsors, especially Nvidia. I went to the Nvidia LAN 2011 on the USS Hornet (aircraft carrier), and it was a blast. About 500-600 people showed up. But when you hit 100+, be ready to have a private server full of games to download, host, etc...plus a screaming internet connection.