If you thought Matthew Broderick looked uncomfortable playing “himself” in “Trainwreck,” wait till you get a load of the actor portraying a married man who wonders if he’s gay in Neil LaBute’s mean-spirited comedy “Dirty Weekend.”

The erstwhile Ferris Bueller’s discomfort goes well beyond the requirements of a script that devotes its first hour to his California businessman and dad being relentlessly hectored about his sex life by a younger colleague (Alice Eve) when they’re both stranded on a stopover in Albuquerque.

A lesbian in a sub-dom relationship, she finally forces him to confess hazy memories of a one-night stand on a previous trip to New Mexico. This leads to a trip to a gay bar and a resolution that is as unsatisfying as it is unbelievable, not to mention pretty tame by LaBute standards.