They're not that bad, but I'm having a tough time figuring these out. The shadows, colors and contrast don't look like stage lighting. #4 and #7 look like flash shots, others don't. And what about the vignetting on #1? Was that done intentionally in post?
#5 I like best because it shows interaction, expression and action, along with a background. I also like #2 a lot.
#6 appears to be focused on her skirt instead of her face (focusing is tough in that environment - it happens to all of us).
Can you tell us more about how you took these, and the lighting in the venue?