I train at Gracie academy, graciemiami.com. Its mostly self-defense for street fights and vale tudo type fighting, not sport MMA or Jiu jitsu. You still learn alot of sport BJJ techniques in the advanced classes. Very good facilities, good people, but IMO its expensive, and i am looking for something more MMA & sport-ish, because i enjoy competing. So i will be switching camps once my contract ends, probably to ATT.
I disagree with the other guy that said that ATT is mostly grappling, i think it has to do with the school you go to. The one i checked out was in Doral, and they teach Muay Thai, MMA stand up and Ground, and they have no-gi and Gi BJJ. Very vast array of classes and the training is by a pro fighter.
As far as FFA, i haven't personally gone, but i've heard some things that i didnt like. For one they force you to take beginner classes, and im not 100% sure, but i think they charge you extra when you graduate to their advanced classes. Also the class size may be huge due to their 30 day trial. Also i hear the beginner classes are mostly grappling.