Unveiled (1986)

Lawyer Bob cheats on his uptight wife Cindy by spending an afternoon with a prostitute. Bob's buddy Ted also commits infidelity on his spouse Julie by seducing his secretary. Bob and Ted decide to further spice up their sex lives by swapping wives without their knowledge. However, Cindy and Julie find out about what their husbands have done, so they plot to get even on the guys by following them to the exotic nightspot The Mask Club and joining in on the carnal activities going on at said club.