I think GC Beach Club has a small workout room. Email and ask them.

Not only does Calmos have music but Blue Martini does as well. Rainbow did, not sure if they still do, have music. Just check all the websites for info. Love is a great bar on the beach. Then there are the LOLOs for inexpensive food along with moderate restaurants and high end gourmet.

When we stayed there on our 2nd week on island we didn't even use the rental car, just walked everywhere. There's even a bar there (can't remember name at the moment) where all the waiters & bartenders go after their shift that stays open until morning.