If you are taking the photos in a small venue and in black and white the don't be worried about using flash. If you do use flash bounce it or use it off camera. I try to make it look like it could be a spot light that is part of the venue. This way you can get the extra needed light in and it not look out of place. You could also drag the shutter to get a bit of the available light in too.
Here is an example taken in a pub with off camera flash.
http://www.talkphotography.co.uk/forums/showthread.php?t=93224
Having just returned from my first gig shots I would say I like the shots.
only criticism is the majority have the same angle. I think moving around and more variety as some of them posted look very similar.
That said my fave is no1. I like the mono and the angle and composition. also did you try different aperture? i think all have been wide open?
thanks for sharing!
They are ok but they are mostly the same shot. Im not sure what the venue was like but maybe try some creative angles like get on the floor and shoot from underneath or climb on top of something (less likely) and shoot from above.