I'm not from Nashville, but I will tell you that there is fabulous riding in Middle Tennessee and several very active bike clubs. Everyone I've met out there has been as nice as can be.
You might post your question on both Bikejournal and Roadbikereview's forums. There are plenty of people on both from the area.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher