I might have tried to use a trail sync on the flash. It would have capture a little motion, and them very crisp at the same time. I can see exactly why this would have been a hard shoot. Without much room to move or compose the picture, it almost ruins your ability as a photographer to do your job. Considering the restrictions, I like 1 and 3 the best. MA is right, I would try and blur the background in PP a little. It would make a dramatic difference in 3, not so sure about the rest. If you have to go back to this in the future, GOOD LUCK!
I think a fisheye lens would have been a cool thing to try here. Get the dancer on the right side of the image, and then the crowd on the left hand side. Figured I would just share that thought.
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