[kevinv033]

albiwan: You have a fairly difficult situation. Hopefully, I can help you out a little. If I were to shoot in that situation and wanted to keep the environmental feeling, I would use my flash to just punch up the ambient exposure rather than be the main exposure.

You're probably going to have to shoot at ambient or close to it to keep the feeling of being in the club. That means dragging the shutter (lower shutter speeds) and high ISO—just try to be very very steady with your hand holding. With the ambient exposure in place, I would then adjust my flash exposure to just open up the shadows a tad. I would not use direct flash, I would bounce from the sides, ceiling, people, whatever is nearby that you can bounce from. You may have to experiment with flash exposure compensation to see what is working for you in that situation...not sure how you do that on Nikon (since I am a Canon guy). I know that Nikon has a much more advanced flash system than Canon, so you may not have to do much but meter for the ambient and bounce the flash to bump up the exposure a tad.

You may get a little motion blur. If the motion is too much for your tastes, I would probably up the flash power a bit and get a faster shutter speed, but then the background could get dark.

Hope that helps a little...