updated 06/02/2014 AT 4:00 PM ET
•originally published 06/02/2014 AT 7:30 PM ET
Romance is in the air for the Kardashian sisters!
The sisters were spotted on a double date at Philippe Chow in Manhattan on Saturday night. Kourtney and longtime beau Scott Disick arrived at the restaurant with Khloé and rapper French Montana at around 10 p.m.
“They definitely seemed like they were on a date. [French Montana and Disick] were pulling out chairs and they ordered for the table. It was a really cute vibe,” an onlooker tells PEOPLE.
The foursome enjoyed chicken satay, lettuce wraps and the salt & pepper lobster before taking photos with guests in the restaurant.
“Everyone was in good spirits laughing and joking all night,” says the onlooker.