Model Karlie Kloss and her financier beau Joshua Kushner got a private show while seeing “Queen of the Night” at the Diamond Horseshoe.

The two were at the Paramount Hotel’s risqué cabaret when a performer dressed as a butler “pulled them out of the audience and took them to a secluded spot in the space’s underbelly” for a private show.

It worked like an aphrodisiac: When they emerged, “for the rest of the evening, they were holding hands and smooching at their table,” a spy said.