a) two one hour sessions on consecutive days b) beginners, but not just starting out c) don't know ages d) don't know numbers e) yes - folkies (it's a fringe event at a festival)

I'm thinking along the lines of: i) listen to what you're sounding like ii) think about the song, and how it's best supported by the accompaniment iii) swing and groove iv) maybe some technical stuff about chord shapes v) right hand technique

...but asking the workshopees what their issues are, and making sure they get a chance to play, too