From the publishers website:
Gen Con. The largest tabletop gaming convention in the Western Hemisphere. A gathering of the particular branch of the geek tribe that likes to get its game on analog-style, rolling dice, pushing lead, and slapping down cards.
With something shy of 50,000 people descending on Indianapolis for a long, hot weekend in the middle of August, Gen Con is the size of a small city. A gamer-tastic Brigadoon that pops up on Wednesday in the Indiana Convention Center and then vanishes on Sunday, until next year.
They call it the Best Four Days in Gaming. It might also be the deadliest.