As I stepped through the entrance, I glanced up—or in the direction that was currently "up" to me at the moment—and took a long look around. The place was packed. Hundreds of avatars milled around like ants crawling around the inside of a giant balloon. Others were already out on the dance floor—spinning, flying, twisting, and tumbling in time with the music, which thumped out of floating spherical speakers that drifted throughout the club.