This photo is not really a nudist photo, but it is one excellent example of the nude life. Figure drawing from a live model is an awesome way to expose one's self (pun only slightly intended) to the nude life. Personally, I have been on both sides of the easel, both as an artist and as a model. I must say I much prefer being the artist, even though the sessions I was in weren't as free and open as this one, with nude models and artists.
I found this photo on the now-defunct "Topless Pulp Fiction" group page. They were a group of women in New York City who worked to promote body acceptance by holding topless book club meetings in Central Park, among other activities. I'm not sure exactly what happened to them, if anyone knows please let me know.
I at least want to thank them for the photo. Even if drama broke apart the group.