Wife and I just got back from Wicked, we had a good time. Wife wore very short dress, but our friend who came with us wore pants and a top, and fit right in. You take your clothes off upstairs, so it doesn't really matter.
www.ontariocouples.com is Abstract, it is good also, and a somewhat older crowd. It is off-premises though, so no sex there and the clothes stay on, at least the guy's.