being scene

I've had an interest in photographing some of the club scene around sydney, but I wasn't sure how the big guys on the door would react if I just turned up with my camera...
At the mini-meet Wendell suggested just saying I was from some magazine and they would let me in - and he was right.
I went to a couple of clubs on Sat night - people who are off their heads seem to love being photographed. I had numerous people getting me to take photos of them, although I am more interested in trying to capture the feel of the whole scene rather than happy snaps.
This is a first attempt of shooting in low and variable light, and also of using my external canon flash - so I would really like some suggestions, and criticism so I can improve next time.
All shots are candid, ISO400, with curves adjustment.
#2 seperate curves adj for girl in the white dress - she seemed a bit flat
#3 had a light cloned out (I found framing hard in such low light)
#1
#2
#3
#4
#5

At the mini-meet Wendell suggested just saying I was from some magazine and they would let me in - and he was right.
I went to a couple of clubs on Sat night - people who are off their heads seem to love being photographed. I had numerous people getting me to take photos of them, although I am more interested in trying to capture the feel of the whole scene rather than happy snaps.
This is a first attempt of shooting in low and variable light, and also of using my external canon flash - so I would really like some suggestions, and criticism so I can improve next time.
All shots are candid, ISO400, with curves adjustment.
#2 seperate curves adj for girl in the white dress - she seemed a bit flat
#3 had a light cloned out (I found framing hard in such low light)
#1

#2

#3

#4

#5
