Maybe an Old Time songs workshop? We have often had old timey workshops that were, in essence, jam sessions - but Old Time Songs could also include unaccompanied ballads, solo pieces and others, as well as the stringband music that's so much fun to jam on.

Also historical songs - that's always fun. And since we're in October, I like the ghoulies and ghosties idea.

I'd say train songs, but something tells me that'll be pretty well covered in a Utah Phillips workshop. (Last night I was playing "Casey Jones" - the "good old rounder but he's dead and gone" version - and my 14 month old son kept going "Choo! Choo!" every time the word "train" came up.)

Dan