Hey Mike, I am not 100% positive about this as I don't live in Atlanta either, but I too am staying at the Fairfeild. I understand you get off on the Marta N5 stop (Arts Center). I think the hotel is about 4 blocks away. When I last spoke with the hotel they also told me that if you give them a call from the N5 stop they will send their shuttle to pick you up. But like I said it's only 4 blocks. Hope this helps you out.
Dave