Depends on how serious you are about this. If you want to do this the “right” way, you need to know exactly what they are going to use your images for. Advertising, posters, CD cover and how many will be printed will help you determine what to charge. There are calculators on line for these kinds of things, so once you get the above info, you can plug those numbers in and that should give you a fair estimate.
On the other hand I doubt you will get what those calculators come up with. You said yourself this is a local band, more than likely with a tight budget. They probably just want some decent shots so they can throw them on their myspace and maybe a CD cover. So as for a fee, charge what you think your time is worth. Think about how much you make at your job, they may think you are worth $20 an hour for what you do. Do you think that is acceptable, do you think your expertise behind a camera and time editing is worth that much? Maybe it’s more, maybe it’s less. No one on this forum is going to tell you how much to charge, they never have told anyone in the past and I doubt they ever will. So you need to figure it out on your own.
And charge them for a CD, they are a band, they aren’t going to frame these pictures and put them on their walls at home.