Earlier Wednesday, Scott Disick ran into Kylie Jenner's boyfriend Tyga while shopping at Barneys New York

By Abby Stern and Michele Corriston
Updated August 27, 2015 11:25 AM
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Credit: Mindy Small/FilmMagic; Jim Spellman/WireImage

Scott Disick hit the club with some fellow E! reality stars on Wednesday night.

Disick, 32, arrived at Warwick (co-owned by JT Torregiani and Sylvain Bitton) in Hollywood just before midnight with a group of friends and hung out with the cast of Stewarts & Hamiltons, including British rocker Rod Stewart, his wife Penny Lancaster and his kids Sean and Kimberly Stewart.

Wearing a black blazer and T-shirt, Disick, 32, seemed to be in good spirits. He chatted with the family while sitting between Rod, 70, and Kimberly, 36, who has been friends with ex Kourtney Kardashian and her sisters since childhood. (She even attended Kim Kardashian West‘s baby shower when she was pregnant with North in 2013.)

Though his hard-partying ways precipitated his breakup with Kardashian in July and he’s struggled with alcohol in the past, Disick seemed mellow at Warwick, staying away from the dance floor and keeping a low profile before leaving before 1 a.m.

“Scott is working really hard to spend time with the kids,” a source recently told PEOPLE of his focus on his children Mason, 5, Penelope, 3, and Reign, 8 months, amid the split.

Earlier Wednesday, the father of three ran into rapper Tyga, the boyfriend of Kardashian’s 18-year-old sister Kylie Jenner, while shopping at Barneys New York in Beverly Hills, California.

Stewarts & Hamiltons airs Sunday at 9 p.m. ET, and Keeping Up with the Kardashians returns Sept. 20 at 8 p.m. ET on E!