I sang Delta Dawn, which I'm sure is not up everyone's alley, but it's a song my friend and I used to sing when we were kids. (I still can't believe Tanya Tucker was only 13 when she wrote this--what's a kid know about being left at the altar and being driven mentally ill?)
My second song was April Come She Will from Simon and Garfunkel.
It's a folk music society, so most people try to stick to traditional, hippie, or at least old music. (So no Journey!) It's pretty eclectic, actually. Last night I think I heard the best banjo pickin' I've ever heard in all my born days.