When we went back in October on a Thursday, we got there between 9 & 9:30pm. (This was right before Halloween.) Walked right in - no wait. There were 4 of us. We were there about an hour & a half and there were always at least a few empty seats. I think with your group being just adults, going during the week after the kid cut off time, you should be good to walk in without a wait.
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