Pros
Scheduling is determined by your availability (flexible), jobs are very easy to learn, and promotion to management is fairly easy if you're reliable, a hard worker, and have good credit. Most people are friendly, and it's easy to find people you enjoy hanging out with outside of work. You also get free popcorn and drinks during breaks, and a friend get to watch free movies.
Cons
Customers can be very entitled, and management is eager to please them, even if it means throwing employees under the bus (I've seen this happen many times). The theater is open 365 days of the year, and getting the big holidays off is very tough; the two or three time off slots for holidays are given out by seniority (good for veterans...bad for everyone else). Both employees and management work long hours for little pay, resulting in a high turnover rate. People come and go, and there seems to be an almost high school environment, where rumors spread easily, everyone wants to know everyone's business, and both employees and management can get in arguments over things that have nothing to do with work.