If you have a car... Get out of Atlanta if possible, head for Helen Ga, its the cutest little town, like a german alpine village. Head up into the mountains, about a 2 hour drive, head north on 985, really nice drive. Stop at a place called Goats on the roof, I can't explain you just have to check it out...
If not ( car) others have stated, world of coke, try the Varsity resturant if is an Atlanta landmark and has been on the food network, want something really special for dinner try, the Sun Dial restaurant $$$$ , it is at the top of the Westin, and the restaurtant rotates, if not dinner see if you can get in the bar for a drink the veiw is amazing. -
Do not ride the marta, especially late, people pandleing and they have had issues from time to time. Atlanta underground, not another good choice, if you are in a
large group you will be fine, I would not go alone just the 2 of you.