Act IV. A fashionable gambling house in Paris. Play is going on.

_Guillot_, _Lescaut_, _Poussette_, _Javotte_, and _Rosette_ are of the company. Later _Manon_ and _Des Grieux_ come in. _Manon_, who has run through her lover's money, counsels the _Chevalier_ to stake what he has left on the game. _Des Grieux_ plays in amazing luck against _Guillot_ and gathers in winning after winning. "Faites vos jeux, Messieurs," cry the croupiers, while _Manon_ joyously sings, "Ce bruit de l'or, ce rire, et ces éclats joyeux" (Music of gold, of laughter, and clash of joyous sounds). The upshot of it all, however, is that _Guillot_ accuses the _Chevalier_ of cheating, and after an angry scene goes out. Very soon afterwards, the police, whom _Guillot_ has summoned, break in. Upon _Guillot's_ accusation they arrest _Manon_ and the _Chevalier_. "Ô douleur, l'avenir nous sépare" (Oh despair! Our lives are divided for ever), sings _Manon_, her accents of grief being echoed by those of her lover.