Here is the first real batch of Infra Red shots that I took a few weeks ago. It's a raggae band named "De Lions of Jah" playing out a bar called Spare Time. I had one strobe on the camera with an infrared filter over it and was shooting with it on manual. I would change either the flash output or the aperature depending on how far away from the subject I was. Even after a fair amount of drinking it was pretty easy to get a good guess on the distance/power quickly. Of course, what really helped things was the ability to get a quick review on the LCD screen.
Here's the proofs.
One interesting thing about the IR shooting is that things tend to change "color". Or, at least grayscale value. For instance, this guy was wearing a black shirt.