Private Relations (1968)

Earl Dudley is a young New York City PR (public relations) man with a posh office in the Brill Building who, despite having wealthy socialite Willi Trueblood as his girlfriend, is drowning in debt and desperately trying to hide from creditors. It's a situation that only gets worse when he inherits a house on Long Island from a deceased uncle who owed a fortune in back taxes. But when Earl gets wind of a Texas hillbilly singer named "Corny" Wilson, he decides Corny's exactly the kind of client he needs to revive his business, and sets about trying to woo Corny's manager, Romney Elrod. But the manager proves to be a tough nut to crack. In a last-ditch attempt to land the contract, Earl decides to hatch a little blackmail attempt by having actress Katie Mallory seduce Corny during a weekend retreat at the Long Island house, with the action to be captured on a hidden camera, but this fails as well as Elrod claims to have been a porn distributor since '58.