[janekm]

A club is one of the few places where this strategy won't work, unless there's an emergency (which the bouncers would obviously know about) the only people who would show up are from the sound and light company whom the bouncers already know.

[Mountain_Skies]

Fire inspector because they are responsible for doing spot checks on crowd sizes. I've been in a club before that was shut down because the fire inspector came in and counted it to be over capacity. The only problem with this plan, beside any kind of penalties for impersonating an emergency official, is the bouncer might get suspicious when he sees you on the dance floor with a drink in your hand.

[gsck]

Always keep a crew shirt handy, never know when you are going to need to sneak into an event!

[CoastalCoder]

I wonder if posing as health inspector or liquor board might work.