Colette de Fuste.

Has anyone any knowledge about naturism or even any swinger type bars in Colleta de fuste.

Caleta de Fuste is just about the last place in the world you'd want to go to as a naturist! It's a man-made resort which is popular with the type of Brits who take the view "not in front of my kids" about naturism. Go further south to Costa Calma and the beaches south of Costa Calma are naturist for miles. Fuerteventura isn't a big swinger destination, and there aren't any swinger clubs or bars - go to Gran Canaria instead.