When she returned, Penzari was shocked to find telltale remnants including baby wipes and “at least 10 condoms.” Penzari said Airbnb put her up in the swanky Inter Continental hotel in Times Square for two nights — with room-service meals — and also paid to change her door locks, clean her apartment and replace her pillows and other belongings.

Airbnb, which operates in 192 countries, has been plagued by incidents of “guests” using its site for sexual escapades, including an orgy in Chelsea last month that was promoted online as an “XXX FREAK FEST.” Late last year, a Washington, DC, woman reported that two men who rented her apartment over Airbnb used it for “male-on-male nude massage.” Airbnb is also under investigation by state Attorney General Eric Schneiderman for potential violations of a city law that bans apartment sublets for less than a month, as well as evasion of the nearly 15 percent hotel tax.

Last year, Susan Patton, a Princeton grad and the mother of two sons at the elite college, outraged feminists when she wrote an open letter to the Daily Princetonian telling female students to find a husband on campus before they graduate.

The red alert — which argued that these Ivy League college girls “would never again be surrounded by this concentration of men who would be worthy of you” — went viral with more than 100 million hits.

Now Patton, an independent HR consultant who lives on Manhattan’s Upper East Side and who’s been dubbed “Princeton Mom,” has capitalized on her fame with an old-fashioned dating manual, “Marry Smart.” Published this week, the book argues that coeds have a limited shelf life “as young, beautiful [women who are] as attractive to men or as fertile” and advises them to spend three-quarters of their time in school on the hunt for Mr. But what happens if you missed your shot and didn’t get that all-important MRS certificate along with your liberal arts degree? She believes that, even in the dog-eat-dog dating jungle that is New York, there is hope for single career women between the ages of 22 and 35 (yes, that’s her cutoff) who also want marriage and babies.

Hookers are using the controversial Airbnb home-sharing Web site to turn prime Manhattan apartments into temporary brothels, The Post has learned.

One escort service is even saving a bundle by renting Airbnb apartments instead of hotel rooms for clients’ quickies, says a 21-year-old call girl who works for the illicit business. Apartments are usually buzz-in.” The prostitute, a buxom brunette who charges up to $500 an hour, said her escort service generally rents an Airbnb apartment in the Financial District or Midtown West for up to a week at a time — then cycles numerous hookers through the place for trysts around-the-clock.

“It’s more discreet and much cheaper than The Waldorf,” said the sex worker, who spoke on condition of anonymity. The agency flies under the radar by having its workers secure the apartments through their own Airbnb profiles, then has them pay the rent with prepaid debit cards.The apartments usually cost between 0 and 0 a day.“[They] probably save 0 to 0 a night by not getting a hotel,” the sex worker said.“It’s really good for business.” One apartment that got turned into an hourly love nest belongs to publicist Jessica Penzari, 29, who rented it out through Airbnb March 21 through 23.“She told me that she was in the Army and needed a place to hang out before she got shipped out,” Penzari said of her Airbnb “guest.” “She said she was being deployed that week.She was asking for places to go out with her friends.” But when a hooker got slashed by a client in the West 43rd Street apartment over the price of his “massage,” Penzari got a call from cops.