Ft Lauderdale beach gets pretty packed and of course you must hit South Beach as well.
You can play golf, strippers, clubs (south beach), shopping, etc...
I don't know how far the Everglades National Park is? I've always wanted to visit that.
For a pretty sweet night out you can hit the Seminole Hard Rock Hotel and Casino in Hollywood Florida. I went to the Casino and after we hit these two clubs that are connected together, Pangaea and Gryphon, pretty sick! There is plenty of restaurants, bars and stores, it's a nice complex.
Too bad there's no NBA/NFL/NHL these days because that's always fun.
Have a good trip!