That's what I did last night, listened to a band called Tip of the Top. I had no strobes, on or off camera flash, just one camera set to 6400 ISO and a 85mm lens set at f/1.4. Yep, the depth of focus was narrow, the lighting poor, so the images have flaws. But the scene was rich with opportunity and I had what I had. I was out with a party of six, Virginia and Albert of the Family Album, my web guru Chris and his room mate, and Deborah. I started the evening checking out the light with Chris as my unwilling model. Discovered right off the bat, focus was nearly impossible at f/1.4 on manual focus in the dark. But in situations like this, you can't give up.