I don't work in a theater but I know people who do. The theater in my town pays above minimum wage (I think $9.00-$9.50/hr), and they pretty much just all bs around when it's slow and get to go to early screenings. It looks like they have a lot of fun. I would work there myself if I didn't already have a job. I work in the same building and see the same handful of theater workers always there so it seems like they get normal hours. They get overtime and none of that working off the clock business. It probably depends on the theater and the management though. I work for a good corporation.
This sums it up pretty much. Working in a theater wasn't a terrible job. Sure you work weekends and they're busy, but you knew that when you applied so no sense to complain about that and they give you your schedule in advance, so your life will take a little planning. A lot of down time during the week, especially if you're working the morning/afternoon, even more so now that school will be starting. My theater did a good job of balancing hours, work until close one night and open the next day.