Those were professionals, but the fun part of photographing them was to use the Canon Angle Finder C to easily shoot from a low angle. With the angle finder attached, I was simply sitting at the corner of the dance floor, looking down at the view finder, and taking photos. I really like the different perspective.

Camera data: 5D, 24-105 F/4 L, Shutter priority with 1/20 sec, and no flash.