Our text was Luke 11.37-54, and our focus was (at least reportedly going to be) on justice, the fact that the Pharisees neglect it and Jesus calls them out. I mentioned the Johnny Cash song, and Rodrigo insisted that we play it; so I put that together with If I Had a Hammer and finished with some different lyrics to the Doxology. Incidentally, the Pete Seeger version of this song is completely different from the one I know, even though he wrote it. I'm sticking with Peter/Paul/Mary, they rock, and they do it effortlessly.
Here are the Doxology lyrics, from a song called Live Into Hope, which I found in the new Presby hymnal. They work with a bunch of different tunes, including O Come O Come Emmanuel, and Lift Up Your Heads, Ye Mighty Gates, and On Christ, the Solid Rock, I Stand.