well, with a lack of light, you cant use a fast shutter seep like you could out side during the day. If the object is not moving, use a tripod and a long shutter speed. However if the object is in motion, flame, band...
I would say you would need a faster ISO film. for a concert, i use 1600 or even 3200. The will be very grainy. Even printing 5x7 you will see some grain. You could also use a flash if you are up close. All bands I go see play in bars and such places so I can get right up there. I personly dont like a flash with color film... but...
A flash, with nice B&W film, and with a touch extra contrast...hmmm I love that for a good punk rock photo.
Good luck