Here's my example. It was really dim light in the gym. I looked around to see if all of the lights were on, but they were! 
So, I shot the game in RAW, tweaked exposure as necessary in DPP, converted to jpg, ran them through Noiseware.
Canon 1D MK III, 135L f/2
Mike
Shooting settings: ISO 6400, manual exposure, 1/400 sec, f/2.0!

