After-school activities at the Miser’s junior high were a mixed bag. There was that fly-tying class that has never come in handy, for example, but at least it was a chance to try something new.

Adulthood shouldn’t be any different — or that’s the idea behind Q.E.D., in Astoria, Queens. It’s a playground for adults who want to, say, practice stand-up comedy or learn how to apply their own zombie makeup. (Not every new skill must be useful in life.)

Q.E.D. is also a showcase for emerging performers in storytelling. On Friday, the comedian Louie Pearlman hosts a musical improv show at 7 p.m. Imagine making up a comic song on the spot.

The music continues at 7 p.m. on Saturday with “Don’t Feed the Musicians!,” hosted by the YouTube-famous Rob Paravonian. (He had a viral hit eight years ago with a musical rant about how Pachelbel’s Canon in D pervades pop music to a frustrating degree.) He and friends will play comedic songs and pick apart chart-toppers, and for only $5.