Frank Sinatra’s former Manhattan penthouse, where Ol’ Blue Eyes entertained the hell-raising Rat Pack, has gone on the market for $7.7 million.

The apartment that Andy Warhol described as a “glittering grotto in the sky” has panoramic views of New York’s East River, four bedrooms and four full bathrooms, and a wraparound terrace.

As might be expected for the former property of the legendary crooner, actor and playboy, the apartment is full of quirky extras. That includes a private gym, a glass spiral staircase, and even a putting green.

Sinatra used the pad for wild parties where glamorous guests reputedly included Marilyn Monroe, president John F. Kennedy, and Sammy Davis Jr, who is said to have tossed champagne glasses from the balcony onto the expressway below.

Sinatra bought the Upper East Side apartment in the early 1960s, spent some time there during his tempestuous 1966-98 marriage to Mia Farrow, and sold up in 1972.