Yes, from the scene where Amanda and Elyot are roaringly, screamingly drunk in her loft in Paris... (It's Amanda's line.)

-I used to know great parts of it by heart and perform it with my then boyfriend whenever we got drunk (or had lunch with friends or went camping or had a quiet evening in, actually...); many couples have "their song", but not many have "their play", which they recite at will...