The men in the family (1967)

Gabriel Pelletier, sales manager for a major industrial firm, would be the happiest of men if he didn't have a family of rare originality. The day Gabriel Pelletier is asked by the firm's management to welcome and accommodate an important American industrialist who has come to Paris to handle a major contract, he realizes the difficulties that lie ahead. How will Mr. Strumberger, who has the reputation of a fierce puritan, react to the behavior of the various members of the family?