Fatcat has a nice open floor and a lot of classes going on. There is something every night of the week. Decent place to go for open dancing if you're past group lesson level. Ample seating for spectators as well.
On that note, I do have to agree with other reviewers in that group lessons are just awful. We come for open dancing and will sometimes arrive early and watch the lessons, and I cringe every time. The teachers are apparently students from their "academy", people who are really not qualified to teach... often they look like college kids who have barely progressed out of basics themselves. There are plenty of other studios that have great instructors with competition wins teaching the group classes, so if you need to learn basics, I'd research any of the other studios around.
The music has been really terrible recently as well, boring and sounds like it came off a generic ballroom compilation CD. They will often change songs right in the middle. Apparently they don't have a playlist ready to go and are trying to hand run every single song.