Adventurers' Club is a place that, I would guess, people really like or really don't like. If you do like it, you will most likely want to spend at least a few hours there. It takes some time to figure out exactly how the club works...unless you have had advance advice, which we did not. There is always some little something going on all over the place, but if you want to see the "go into a separate room, somewhat scripted show", these happen about every 45 min., if I remember correctly. (It's been nearly two years, but we are going back in March...YEA!) We, obviously, really liked our experience there. We spent probably 3 hours, going in and out of the showroom. I think we saw about 4 skits total. (Skits, showroom...those are my words. I don't know if there is other lingo that one uses for the AC.)
I would recommend not to schedule dinner reservations for afterwards, because you may not want to leave. (We had grandparents babysitting our kids, so we left around 10:30 and were very disappointed we had to leave.) One of the other posters was correct when he mentioned that the show gets wilder as the evening wears on. Of course, if it ends up that it's not your type of place, leaving for a dinner ressie probably wouldn't be an issue.
I hope you enjoy it as much as we did.