Last night was Neurodance 08 at Club Neutral.

These are my favorite images from the night.

On a technical note, one thing I learned last night was that the floor at Club Neutral is quite reflective, and can be used to bounce a flash quite effectively, if there are no people blocking the bounce. In a club with so many dark (read flat black) surfaces, the floor is all I could reliably rely on. Too bad I only discovered it late in the evening.
Also, use a snoot as to make sure there is no light bleeding from the flash to the subject: all the light should be reflected.