A pizza-party playdate between two young couples turns very, very friendly, advancing in a jumble of hangups and high hopes, with just enough booze, bong rips, and body-image insecurities to go around. And before we know it, a coy indie sex comedy has fully disrobed, revealing — wait for it — a deep relationship drama, characterized with tactfully exaggerated comic proportions and benefiting from the pitch-perfect casting of Adam Scott, Taylor Schilling, Jason Schwartzman, and Judith Godrèche. Together, they have the right proportions of wit and feeling, and their shared escapade is funny and racy without ever trying too hard.