We visitied CNN Center prior to a concert next door at the Philips Arena. CNN Center is full of choices when it comes to eating in the food court along with numerous retail shops with Atlanta Sports team merchandise. We were not able to take the CNN Studio Tour because of time constraints.
The food court was wonderful, many places to sit and enjoy the A/C while chowing down. They had Chick Fil A, Wendy's, Chinese, Mexican, Pizza, Italian and numerous other choices.
Definitely recommend CNN Center when in the area for Philips Arena and / or the Georgia Dome etc.
CNN Center has a very easy accessible entrance to Philips Arena inside the food court so you don't even need to go outside to enter the Arena when done eating.