If we're gonna mention singing, I do that too, occasionally. I'm in the Society for Creative Anachronism, and I used to do a lot of singing for events, singing medieval and Renaissance period songs, along with filk songs, too.
My favorite one to perform was "The Scotsman" -- you may have heard it on the radio, Dr. Demento, etc, about a Scotsman who gets drunk, passes out, and two pretty girls come along, lift his kilt to admire his goods, and then leave a blue hair ribbon tied around his cock. The Scot wakes up to take a piss, and when he lifts his kilt and sees the ribbon, he gasps out, "Och, lad, I dunno where ye been, but I see ye won first prize!"
I also used to do more traditional stuff like "Greensleeves", "Rose, Rose", etc...lots of fun. Nothing like getting up to sing, dressed in medieval garb, in front of a crowd of other people dressed the same way, at an authentic medieval feast.
Yes, I am a re-creationist geek.