It's not out of the question... back when I was a college student in Rochester, I was riding in one of our parks ( Genesee Valley Park, as it happens ), and was more than a little surprised to encounter some topless ladies lounging about and one riding a bike.

They were the locally-famous "Topfree Seven" women protesting for the right for women to go topless in New York. They eventually won.

Unfortunately, I kept getting lost, and had to circle the park again and again and again and again...