I have not checked these folks out but they look interesting. It is on Thunderbird, so it is a little out of the way from Mesa.
They do have group lessons followed by open dancing on Fridays and Saturdays. What I found most interesting is that the video the lesson each night and put it on their website so you can review it. Very nice.
You can check out their calendar here and their videos at this link.
They are also listed on the left side of the blog.
If you have any experience with the Fatcats let us know.