Thanks for including Jim Kweskin and the Jug Band. They were a fad in the mid 60's, playing many songs rooted in the 20's, and I actually owned two of their albums. I can tell you that Jeff Muldauer was a virtuoso on washtub bass. Another gem if you can find it is "Washington at Valley Forge" with simple lyrics so catchy that I've never forgotten them. Thanks for jogging my memory.