>>What is a mystery to me, though, is why it's not allowed in the wonderful little Mecca of Nashville, Indiana. <<
It's hard to say--busking was only legalalized in Indy a couple years ago. I don't get to Nashville too often, though I'm down in Bloomington all the time, but it's possible that the official stance has changed there, too.
It's stupid, really--such a touristy town, Nashville is; you'd think they'd want as many attractions as possible, especially ones that come at no cost.
Who can fathom the official mind?