Kim -- along with her sister, Kourtney, gal pals La La Anthony and Stephanie Shepherd and Jonathan Cheban for good measure -- hit up Matsuhisa in Bev Hills Tuesday night ... and Kanye West's ex looked ready to mingle.

Though she wasn't wearing her wedding ring, Kim was blinged up just a bit to accessorize with a super cool neon green dress ... and she looked pretty happy with her friends.

Of course, Kim's outing comes just days after we broke the story ... she filed to divorce her famous husband of nearly 7 years after several turbulent months that started right around the time he announced his run for president.

As we told you ... everything seems to be amicable -- Kim's asking for joint legal and physical custody of the couple's 4 kids, there's a prenup neither side is contesting, and Kim and Kanye are committed to co-parenting.