What are some agent in ATL?

I would try to work with groups such as Dads Garage or other improv troupes. If you don't want to work in a comedy venue then you need to call around to the smaller theaters and ask about volunteering and then auditioning. I always worked through my photographers...I would model free for them, they would give me good head shots and help put out the word of mouth. I will warn you though, the Atlanta market has gone way down. You have to network your bottom off to even make a dent.