www.caffeineandoctane.com happens every first Sunday of the month up in Dunwoody just outside of Atlanta.
Where exactly will you be since Atlanta is spread out?
https://www.bscracklinbbq.com/ Best place in Atlanta for BBQ that I've found so far. We have others that are great too. Grand Champion, Dixie-Q, and Community-Q. We also have other food that's worth checking out. Buford Highway in general has a lot of ethnic food places.
Plenty of places to hike like Blood Mountain, Amicalola Falls, Pine Mountain, Burnt Mountain, Lookout Mountain, Panther Creek, Tallulah Gorge, Cloudland Canyon, closer in to the city are East and West Palisades, etc etc etc. Seriously, we've got a lot of fantastic outdoor spots to visit.
Driving trips are Suches Loop, Blood Mountain Loop, Richard B Russell Parkway. Take a trip up to Highlands, NC by cutting east in Clayton, GA takes you through some great roads. Go to Tail of the Dragon if you want. I prefer Cherohala Skyway personally.
There's plenty more to do. Don't skip the aquarium if you like that sort of thing. It's very nice.
Skip the Varsity, lol.