The best gym facilities are those Mother Nature provided! Sand to walk or jog on, and water to swim in! Red Stripes prove to be good curling weights, but they must be frequently replaced with full bottles for best results.

To answer your question, I know Treehouse has yoga classes. They also have some gym equipment but maybe you can arrange day passes with Gail. Other than that, I've only heard of a gym being closer to the roundabout, nothing near Coco I'm aware of.