We went to a beach bar that had a monkey. It was entertaining. Don't leave your drink unattended as they will run off with your drink and drink it. Check youtube and see it for yourself.
The beaches on the French side - Orient Bay, our favorite is a must! Walk down the beach (to the left) from where the cab drops you off and the prices will drop dramatically for a chair, umbrella and a drink!
There are nudist walking the beach, so keep that in mind if you're bringing children.