In a few weeks time, I'm going to be shooting a a band whilst they play a gig.

The room is small, low ceiling and dark.

Any tips or advice would be greatly appreciated.

Chris

I'd say get a nice wide fast lens, up your ISO and shoot lots. Dependant on the amount of light it may be worth while turning up half an hour or so before it's due to start to get a feel for how much light there is and what combination of ISO, shutter speed and aperture you'll be able to achieve.