In fairness to PP, isn't it safe to say that Nashville is a particularly cosmopolitan city (culturally at least) compared to most of Tennessee, or even the entire South?
But again, the Ground Zero Mosque experience shows that buttheads are everywhere.
I definately wouldn't call Nashville cosmopolitan, but it is an actual city, which puts it somewhat ahead of most of the South. It votes moderately Democratic only because it's the rare Upper South city with a decent sized black population. It's the headquarters for country music, the Southern Baptists, and the Tennessee state government, all bastions of liberalism 
You can imagine how the suburbs are there. If you're looking for a Southern city with a more metropolitan feel, I'd recommend Raleigh, Charlotte, or Atlanta. And FWIW, Downtown Chattanooga easily has the best "going out" scene in the state.
Re: country music...
I get the impression that the younger, more alt-country artists in Nashville (and elsewhere, for that matter) are a lot more left-wing than the corporate acts, in general. Also, isn't Nashville now home to a
lot of musicians, of many different genres?
