The woman's name is Winkler. She's an artist (specializing in Impressionist nudes) who ran a brothel, it seems, from her gallery studio, employing mostly college students. The clients? Wall Street financiers and, well, you guessed it. The New York Post reports:
…The johns included Wall Street types and Orthodox Jews in prayer shawls, [building] residents said.
"I've run into groups of four to five Orthodox Jews on Friday afternoons decked out in their talis coming in for a quickie," one said.
The space is labeled "art gallery" on the lobby directory. Inside is a row of small rooms, said a neighbor who got a tour of the place.