A British swingers’ club is kiboshing clowns attending its annual Halloween orgy.

Paradise Spa in London is advertising the group sex extravaganza instructing lusty couples to wear their sexy costumes, the Daily Mirror reports.

But there is one exception -- no jaunty jesters. Clown costumes are forbidden.

"Join the Staff and regulars for this years Halloween Party, fancy dress with a prize for the best! PLEASE NOTE, CLOWN COSTUMES ARE NOT PERMITTED AND WILL BE TURNED AWAY."

Whoa!

The sin bin claims it has a fully stocked bar, a big screen that shows porn non-stop, hot tubs and sex rooms. It offers free pizza on weekends.

Meanwhile, porn site xHamster says that people prowling for sex-rated clown action is on the rise.

The website reports that searches for clown porn has climbed by a whopping 50%. There are orgies featuring clowns, BDSM with clowns and every other kind of hardcore you can think of -- all starring clowns.

And the Daily Star is reporting that prostitutes have seen a spike in johns requesting kinky clown related services. But the escorts themselves are wary.

"I’ve had guys asking for girls to dress as clowns and guys asking if they can be dressed as clowns during meetings,” a madam told the tabloid.