Playback (1996).

The marriage of David Burgess, a senior executive, and his beautiful wife, Sara Burgess, an interior designer, is under great strain because David is in the process of putting together the biggest telecommunications merger in the history of the business. Sara suggests that they attend a kinky sex club to revitalize their marriage and help David to relax. However, David's problems are exacerbated by a huge power struggle at his office between Karen Stone, Gil Braman and himself. Karen, a beautiful, ambitious, ruthless, senior executive, is determined to take over this merger at any cost. To further her aims she hires the services of sleazy divorce private detective Ernie Fontenot to spy on the Burgess's. At the date of the merger draws near and all the blackmail and dirty tricks start to play themselves out, who will come out the winner?