If you want to try something new and fun ... the Atlanta Food Truck Park is for you. There are lots of great options. We saw BBQ places, Sandwich places, Dessert places ... a great variety.
They even had a place for dogs to get treats. They have picnic tables and enough parking (even though I bet it might get a little crowded sometimes) for easy access.
I would recommend this as a cool stop if you are exploring Atlanta and want to avoid the chain restaurants and the malls.