KHLOE K & HOUSEWIVES RUMPUS

Khloe Kardashian and Real Housewives stars raise ruckus at NYC nightclub.

Real Housewives of New York reality divas Kelly Bensimon and Ramona Singer had a catfight over curvy cutie Khloe K at nightclub Quo.

The dueling celebutards refused to talk or be snapped with each other when they arrived at the promo event for Three Olive Vodka but when they spied KK they went kukoo for Kardashian.

After Ramona saw Kelly chilling with Khloe,  Ramona "pounced like a tiger," The NY Post reports.

 "Suddenly there was a ruckus. Ramona barged her way through the VIP area and practically jumped over a table to get to Khloe, and tried to sit between her and Kelly, who was mortified and left immediately," a witness divulged.

 "Ramona did not steamroller her way in -- Khloe invited her", her rep said. "They chatted and they took a picture together."

And everybody gets their names, the club  AND the sponsoring product mentioned - win-win for everyone!