Tom Smith was selling his music, and he was in a concert. I didn't make that, as I was in a game at the time, but he's hoping to do more gaming conventions. Luke Ski was there as well.
I was in a larp called Last Night in Carcosa. The guy playing the minstrel was well cast, able to break into a verse at need. Didn't hurt that the first thing he sang was "Songs from the Wood". He also wrote down from memory the Carcosa song from the Chambers anthology, and I think he composed some poetry during the game.
No actual singing the the Gilbert and Sullivanesque game I played of Full Light, Full Steam, but the mood was definitely there.