Dave doesn't say, but PJ grew up in Atlanta, as did my wife Karen.....but the place changes almost daily anymore. I lived there for 3 years and when I went back I could barely figure out how to find my HOUSE!!! Outside of folk technically, but if you haven't been to Underground Atlanta, go to "Dante's"...kind of a must see and generally the music is still folkie. And drop into the "Varsity"...Georgia Tech's legendary greasy spoon. No music, but the place is a riot. Take along some Maolox.
My sister-in-law told me about a place awhile back, just off the square in Marietta (Karen and I got married on the Square), but I don't know if its still there. Had a couple of good blues nights there a few months ago. I'll try to catch her before you go. (You oughta' stay with her family--they got a LOT of money!!!)
Have a great time!!!