Music??
Music Midtown is next weekend.

Suwanee??
Suwanee is so far out there really isn't any good riding in that area.

CDC??
That's on the Emory campus. Lots of folks ride to work at Emory/CDC.
Once you find a job try to live in the same part of town so you can commute by bike. Or at least live where you can find a decent commute route. Traffic around here sucks bigtime!!

There are many good places to ride and there are LOTS of organized/group rides every weekend, some during the week.

Atlanta isn't a bad city if you can get around by bike. If you have to drive make sure you live close to work (<10 miles).
We live 5.3 miles from my wife's work and it takes her 25-30 minutes to drive, park, and get to her department. In the afternoon it takes her 30-40 minutes to get home.