Khloé and Kourtney Kardashian's Fun Night Out in Vegas
updated 09/22/2013 AT 05:40 PM EDT
•originally published 09/22/2013 AT 04:40 PM EDT
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.
Kourtney Kardashian 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