Mustique is nice, but small and not much going on. We've only been there sailing and at anchor, never stayed ashore. Had many, many drinks, both at Basil's and up at the Firefly. Ran into David Bowie there a couple of years ago when we were drinking at Basil's. Bowie has a home in Mustique.
A place we love to go is the British Virgin Islands. Great island, lots to do, and really inexpensive. You can fly in, or just ferry across from the USVIs.
We have loads of contacts in the BVIs, so if your interested, just hit me up. I can set you up with places to stay, to eat, and to party
Danny