I would err on the side of showing up sooner rather than later. The policy is $41.50 cash only one ticket per ID just like previous posters said, however, I asked a few days before how many tickets were sold and was told 10 by two different people. Tickets go on sale two hours before the performance (not sure about matinee) and I showed up around 4:45 pm. Myself and my friend were numbers seven and eight in line for rush and they only sold six tickets at that performance so we were out of luck. Also, the night before, apparently they sold somewhere around 19 rush seats, so expect some variation in number of tickets sold. I'd advise getting there a bit earlier because some days you may be able to show up at 6pm and get a seat, while others you may not.
