We recently got tickets to Jest Serendipity through House Seats. Jest Serendipity is an improv group. The group is split into two teams that battle against each other in various improv games. The audience gets to suggest the theme for the games and then votes on the best team. Think Wild 'n Out.
It was enjoyable, but I found it only moderately funny. My wife really got a kick out of it though and is eager to go back.
The showroom is really small, so no matter where you sit you'll get a good view.