This article is from the The Complete Guide To Hack Stand-Up Comedy, by Steven Rosenthal and Steve Silberberg (firstname.lastname@example.org) with numerous contributions by others.
"I don't have a joke about that, I just wanted to see who I can hang with
after the show!..." Pot jokes always turn into a reference about the
munchies so stay away from that gag. Also, the one about pot being
different from the other drugs ("There's no gang wars over pot, just pillow
fights...") has been done.