After her Friday afternoon custody case appearance in Los Angeles Superior Court, Britney Spears spent the evening partying with her ‘play cousin’ Ali-and Dallas Cowboys QB Tony Romo at Ketchup in Los Angeles.

“Britney walked around the restaurant into the lounge where she met up with some people,” an observer tells PEOPLE. “She didn’t eat or drink …[It] seemed like she was rounding up people to go to [out]. She was very friendly and smiley, in and out.”

“Alli was meeting up with Tony and his friends at Ketchup and Britney wanted to come along. Tony and Alli have been good friends. They’ve known each other for a little over a year. ”