From my understanding anyone under 21 will be asked to leave at 9.
I recomend getting there at 9pm or at least by 9:30. The first show starts at 9:30 and the second show will probably have more adult content and they may or may not ask you to leave. But you'd have a good 60-90 minutes there and that's enough time to see the first show, get some sweet bites, and enjoy the atmosphere. This place is a must see and it will not disappoint.
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