Friday:
 • The 7th Annual Del Close Improv Marathon, in which a multitude of improv groups perform for 58 straight hours on three separate stages at the UCB and Abingdon Theaters. [flavorpill]
• There was a Scottish indie scene long before Franz Ferdinand came bouncing into metrosexual hotness; brush up on your folklore with Teenage Fanclub at the Bowery. Wistful 30-somethings are almost guaranteed entry. [Upcoming]
Saturday:
 • 24 Hours of Mass Construction, in which a series of 10-minute plays are conceived, written, rehearsed, and performed all in the course of a single day. Go on and support your cracked-out on stage brethren. [ToMD]
• Do you need some new clothes that are actually old clothes in disguise? You're in luck: the Emg. Vintage Sale comes to the Tribeca Grand Hotel today between 2 and 6pm. Chanel and Miu Miu and Dior, oh my! [Paper]
Sunday:
 • Acoustic band Alarm Will Sound tackles the work of techno-elite Aphex Twin with strings, voices, woodwinds and percussion for their Unremixed performance. It's at the Lincoln Center, though, so leave the mushrooms at home. [LC]