The 37-year-old singer threw himself a consolation party replete with models, Leonardo DiCaprio, Tom Hardy and Emile Hirsch. Thicke and then-wife Patton separated in February, and the 38-year-old actress officially filed for divorce October 3.
"There were a lot of models there," a source told Page Six of the fête. "Leo and Robin were being super flirtatious and talking to tons of girls. Robin, in particular, was dancing and talking to a pretty brunette throughout most of the night."
"At one point, he grabbed a girl's hand and was like, 'Let's dance!'" the insider continued. "He was in great spirits, and put on a mix of music including pop, hip-hop, older stuff from the '90s and soul. Everyone was dancing until past 3 a.m."
Thicke and Patton were together for nearly nine years, and have one child, Julian Fuego. The actress cited "irreconcilable differences" for their split, and is seeking joint custody of their son.