Wow...keep 'em coming. The power of music is indeed strong. Thought I'd add some of the songs from my experiences...
At a prayer service Wednesday night, the main hymn was "Make Me a Channel of thy Peace". I heard Sinead O'Connor singing this on the radio this morning -- recorded at a concert for peace, I think in Ireland.
Tomorrow night at a weekly traditional-music performance I'll be leading "There But for Fortune" by Phil Ochs (if I can get through it) and the sea song "Paul Jones". It has a rousing, simple chorus -- "Hurrah, our country forever, hurrah." though it's a bit martial.