[Wannabe]

It sounds like you may have stumbled upon The Outdoor Co-ed Topless Pulp Fiction Appreciation Society. It's an open group of progressively-minded women who frequently get together, usually in a NYC park, to read and sunbath sans their tops. I'm not a New Yorker, but I've been a big fan of theirs for a couple of years now via the web. They have a website and some members are on Twitter (look up Cheyenne Lutik).

https://coedtoplesspulpfiction.wordpress.com/