I like your set of photos, and I second Ash's motion.
Also, you might want to try using cloning and software's other retouching tools to reduce or eliminate the reflected overhead lights.
At future indoor shows, you might want to see if a polarizer would successfully tackle those reflections.
Crowds of passersby are a challenge. The first photo would be even stronger without the people in the background.
In your Flickr gallery, I'm particularly fond of these photos:
http://www.flickr.com/photos/hardleers/5589740127/in/set-72157626429839506 http://www.flickr.com/photos/hardleers/5590325894/in/set-72157626429839506/ http://www.flickr.com/photos/hardleers/5589737791/in/set-72157626429839506/
Also in your Flickr set, the side-by side presentation of the two photos of the orange car is quite effective.
Best wishes, and I hope to see more of your photos.