I'm a charter member of the Middle Tennessee Z Club. We are planning a Z car show and open to the public cruise-in for all cars for this April 12 at Nissan's corporate HQ building in Franklin, and we do several events each year. As we are a Z club our car shows have historically been "Z only".
There is a Saturday morning (8am-?) Cars and Coffee event at the Carmike Cinema in Franklin off Cool Springs Blvd. behind McDonalds that unofficially runs year round (weather permitting) and several Nissan employees usually attend as well as many local enthusiasts, and many car shows and cruise-ins are scheduled throughout the area.
All the local automotive happenings can be found at:
Gearhead Gazzette