This is one of my regular gigs. I do the production shots for the theatre performances at the Workhouse Arts Center in Lorton, VA (USA). This particular company is a student company. They audition for it late summer and work, learn, and perform several times during the year, until the next time for auditions.
The shoot is of the final run-through/dress rehearsal. The performance is inside an art gallery set up with stage lighting etc. For the shoot I was allowed to move around on staging area with the actors as the director trusts me to not interfere, get in the way and to be otherwise stealthy. I had two cameras, a K20D and a K-7, with the DA*50-135 and 16-50. I had one run through to do this, had not seen the play before nor had I a chance to read the script ahead of time. So it's go in and shoot cold, not knowing what was going to happen when and trying to anticipate the action/scenes.
The shots are used for record-keeping, promotional purposes, printing in their publications, and for sale to the families/actors/ others that may want them (that's done through me directly and I profit from that).
So here's a few. I'm just picking from the handful I posted on my flickr.