Getting between sessions meant pushing through crowds reminiscent of major crossroads in Tokyo. Entering an almost-completed session to get a jump on the next was not allowed, so people lined up in the hallways. The smaller sessions such as the lockpicking village failed to offer a sanctuary from the crowds and were routinely packed as well. The future of an overtaxed DEFCON may reflect the failure of Comdex, a Las Vegas conference that symbolized the era of the personal computer.
Source: https://threatpost.com/rethinking-defcon-082211/75567/