Actually, GameKeep is in Hermitage, so it'll be right near you. They've got a game room, and I believe there are some folks who game there on a regular basis on Saturdays (and maybe Sundays). Save up $100 in receipts from his store and turn them in to get a 10% discount on your next purchase.
I live on the west side of Nashville, too far to go to Hermitage regularly. We game at Blackthorn, a store in Dickson TN (so it'll be too far from you, most likely). Less selection on hand, but quite family-friendly and a really good environment. The store offers much better discounts (and Mark can order pretty much anything and still offer a discount), and if you're into minis, he hosts tournaments whenever the new sets come out.
Although they don't have gaming space, both Nord's Games inside the Hickory Hollow Mall, and Great Escape in downtown Nashville (21st Avenue, I think, although it might be called Broadway in that stretch) carry gaming materials. Nord's has a good selection but doesn't appear to discount anything at all; I'm not sure if Great Escape discounts or not.