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.
Meh, at least Brentwood tries to be cosmopolitan. There are some fusion Asian places in Brentwood that are actually pretty good. Of course Murfreesboro and the other suburban areas of Nashville like Hendersonville, Gallatin and the like are a different sort of place. I live in between Brentwood and the Nolensville Pike area, which looks a little run down, but is filled with immigrants from all over leading to many good food choices at decent prices. It's not bad at all.
