Khloé (left) and Kourtney Kardashian
09/22/2013 at 05:40 PM EDT
It looks as if Chinese food is a Kardashian family favorite.
Just one night after Kim Kardashian
and Kanye West dined
at Hakkasan in L.A., the new mom
's sisters were spotted dining at the restaurant's Las Vegas outpost.
and Khloé Kardashian Odom
hit Hakassan inside the MGM Grand Hotel and Casino at 10 p.m. on Saturday before attending the IHeartRadio Music Festival.
The pair were joined by Kourtney's boyfriend, Scott Disick
, and rapper Tyga (who'd also had dinner with Kim and West the previous night).
An onlooker says the siblings were "in high spirits" throughout the night and Khloé's marital problems
seemed far from her mind as the group laughed and joked while sipping champagne and Hakassan's signature nonalcoholic Kowloon Coolers (a mix of berries, lychee and grapefruit juice).
The quartet dined on salt-baked chicken with ginger and scallion oil, roasted Chilean sea bass with Chinese honey and jasmine tea-smoked beef short ribs.
– Mark Gray & K.C. Blumm