Good question, Mbo. It's a little late to be looking for songs for a particular topic. Yesterday was a full moon here. Might I suggest "Full Moon Frenzy." This would allow songs about the moon and mythical associations to the moon. It would allow just about anything else, because you could blame it on the moon's influence. ("I was looking at the moon last night, and it came to me that this Jimmy Hendrix tune would sound great on a banjo.") It could mean something completely different to, say, Catspaw.