The trick that makes friends who are struggling to go home leave...

Duchess Milouin - the cheat sheets
You served the coffee that announces the imminent end of the evening and your friends seem reluctant to leave? Duchess, give us the solution!
It's the guide to good manners that offers us the ultimate weapon for the descent: orange juice. With this clearest and most polite message, you announce the end of the festivities and the alcohol...