3 for All

A friend of ours recently introduced us to this Improv Theatre group based in Fort Mason, SF, and the two shows we have been to were quite funny. Last night we saw 3 for All, and I was blown away by how hilarious it was. I was laughing so hard, I was in tears by the end of the show. Unfortunately, they play just one more night (tonight), and I'm not sure when they will perform next. How can these guys show up, with no plan/script, and put on such a great show. Very impressive.