Well, I've been getting a lot of mileage out of "The Key of R" since I learned it from Bill D earlier this year. Let's see what else:
River (Bill Staines)
Green Grow the Rushes
Mountain Dew
Don't Fence Me In
Our House (always welcome)
Sioux City Sue
Charlie and the MTA
Four Strong Winds
Hole in the Bottom of the Sea
The Lady Who Swallowed a Fly

-Joe Offer-