After their Golden Globes win for Best Original Song, rockers U2 partied with “Mandela: Long Walk to Freedom” star Idris Elba at a Weinstein Company and Netflix after-party.

Taylor Swift had a dance-off with friends, Harvey Weinstein toasted with Julia Roberts and Meryl Streep to celebrate “August: Osage County” despite it being shut out, and Leonardo DiCaprio and Bradley Cooper sat with their moms.

While guests swilled from Moet mini-bottles and golden goblets, pregnant Kerry Washington abstained, but made a rare public appearance with husband Nnamdi Asomugha, staying until after midnight.

Tina Fey and Amy Poehler threw a bash at the Chateau Marmont, where guests danced and ate cronuts and cupcakes.

Matt Damon made the rounds with his arm in a sling (which only appeared after the telecast) from a cycling accident. Minutes after he’d left HBO’s bash, Ben Affleck showed up searching the room — where stars included Tom Hanks, Emilia Clarke, Martin Scorsese and Jonah Hill — muttering, “Where’s Matt Damon?”