"Couples Retreat," the ensemble comedy that came out in 2009 and ended up becoming a box office success (but a critical flop), introduces us to four couples (obviously), all of whom are experiencing growing pains in their relationships ... and all of whom decide to try and mend fences with each other by traveling to a tropical paradise. After they discover a resort called Eden West that offers a group discount if one couple enlists three others to join, they decide to set out on an adventure together.

First, there's Dave and Ronnie (Vince Vaughn and Malin Åkerman), who live in the suburbs of Chicago and are having problems because Dave's busy work life leads to him generally disrespecting Ronnie and her needs. Meanwhile, Joey and Lucy (Jon Favreau and Kristin Davis) are high school sweethearts who are both worried that they missed out on life experiences by getting married and having...