I was very poorly lit and my first time shooting something like this (it also made it difficult to focus). I think the first shot was incredibly successful considering. I was lucky as he was standing still like that for a few minutes so I was able to try different settings to capture it.
Got any suggestions for improving? I was actually trying to time my captures when the lights would swing around or light up with the music.
Don't be afraid to bump up the ISO to obtain a better shutter speed. Noise doesn't always equal bad image. I think in this case it would have served you better to bump up the ISO to get a faster shutter speed.