A good friend of mine is in a metal band. A proper thrash metal band and was playing at a local club known to have good lighting. Naturally I had to be there, I've been away from concerts too long and I needed to get back into it.
The show was hampered by two things, my rustiness for one, and the lighting guy was asleep at his job. He only woke up when Hypokalypse (my friend's band) hit the stage. About that time I got my skills back, and here are some of the results.
The band knew how to interact with the audience, which always helps to make good shots, and they had a fog machine which diffused the light, making it better to shoot by.
Nikon D2x, 50mm f/1.8 at 1600ISO with a 1/100sec shutter speed. Run through PhotoShop to reduce noise.