Everyone has subjects of conversation, ladies for instance…. people in high society always have their subjects of conversation, c’est de rigueur, but people of the middle sort like us, thinking people that is, are always tongue-tied and awkward.
There are no more uses of "de rigueur" in the book.
Show samples from other sources
He mailed it in an envelope with the mourning vignettes that were de rigueur for a letter to a recent widow, and with no return address on the back.
Gabriel Garcia Marquez -- Love in the Time of Cholera