Loca Lunas is a great tapas restaurant located just off Peachtree. It has a live salsa band that plays on weekends too. Parking is kind of screwy, and is normally cash only, so plan some time for that.
I recommend making reservations through opentable.com. through their site you can earn dining points that you can cash in for certificates to registered restaurants. They have alot of the great restaurants in atl (Atlanta) on there.
Loca Luna is Atlanta's premier dining and Entertainment venue. Voted one of the top 10 Latin Clubs in America by USA today. We feature Latin American and Brazilian Tapas, exotic drinks and always live Latin music.