Tyga wasn't seen drinking, but he did smoke with Brown, while Scott was busy "full on trying to hook up" with one of the women.
"Scott was with one girl the whole time, holding her hand and leading her around the house," the insider added. "They were laughing, smiling, and it was obvious Scott was into her. They'd disappear for a while and come back."
After the pre-game at Tyga's house, the group eventually ended up at 1Oak club in West Hollywood around 1 a.m., but they were only there for an hour due to their late arrival.
"At the club the crew was at a large table and all the girls were surrounding the guys," the source noted. "Some of the girls went back to Tyga's [after they left]."
Despite his constant partying and dating his on-again, off-again reality star girlfriend, Tyga swears he's not trying to be a topic of conversation in the public eye.
The rapper opened up to DuJour magazine in an interview that was released on Tuesday, saying, "I only like people to know what I want them to know."
He continued, "People didn't know what Tupac was doing. That's why he was so iconic. Before [the Internet], it was real superstars...I don't engage with people that much. You can't base your life off waking up every morning like, 'What are people saying about me now?' Then I'd never stay in my creative headspace...I just want to put all my answers in the music."
He added that he aspires to be, "The King of Dopeness."