What resort in the film couples retreat filmed at?

Location Couple Retreat movie was filmed is - Bora Bora. The real name of the Resort is - The St. Regis Bora Bora Resort.

Following link will show you where the movie was filmed:

http://www.sdnn.com/sandiego/2009-10-05/travel-tours/discover-the-real-couples-retreat-in-french-polynesia

If you watch, end of the movie credits, you will see all this information! Enjoy!