I can think of one good answer to your "wee question", Guest. If the song is in PD you can perform it live without fear of reprisals against the club from the "music police". Frequently these days, the small, friendly clubs have their performance licenses threatened because their performers are singing copyrighted songs without making payments to the authors. It's another nail heading for the coffin of our already wheezing live folk music scene here in So. Cal. Thanks for posting them, Other Guest.