A more helpful title for this date movie would have been Couples, Retreat! Vince Vaughn and Malin Akerman play a husband and wife sucked into a group vacation with close friends in various stages of marital collapse (including Jon Favreau, who coscripted with Vaughn and Dana Fox). They arrive at a Polynesian island resort, run by relationship guru Jean Reno, where the various therapies—talk, yoga, massage—serve only to set up tired insult humor and smarmy sight gags. Peter Billingsley (Ralphie in A Christmas Story) directed; with Jason Bateman and Kristin Davis. PG-13, 107 min.