Hilarious, inexpensive, and the shows are family friendly, which can be hard to find with improv. The show itself is short form comedy and games, and the "after hours" shows differ in the day.
Most shows are followed by an After Hours show. You can stay for free if you saw the ComedySportz show. (Not all are as family-friendly as CSz, but there's some great stuff happening in that slot!
Portland's longest-running comedy show, ComedySportz is like a live version of Whose Line Is It Anyway, with professional actors competing to see which team can make the audience laugh the most. Great for date nights, group events, bachelorette parties or family outings.