Welcome to Miami....just moved here from Orlando...which I didn't want to leave. There are only a few places to ride down here. There is a nice place just west of Ft. Lauderdale called Markum Park, not bad water, narrow so you don't have boats going in idiots going in circles churning up the water, but the place does get a little crowded at time.
I don't know of any wakeboard clubs....I hate to say this on this site, but I joined a ski club and actually picked up skiing the course. Check out this site
www.miamiwaterski.com. They do allow wakeboarding, but you can't use wake enhancing devices in the canal only in the open section of the lake. Its nice cause you can store your boat right there next to the private lake, I am on the water about 4 days a week. The bad part is not much wakeboarding, but there are a few us that do....let me know if you have any questions.