Georgina Bloomberg recently graduated with an art degree from NYU’s Gallatin School of Individual Studies, but the 27-year-old’s real passion is horseback riding. “I ride professionally; it’s what I do,” she explained to us at the Veuve Clicquot Polo Classic, when we asked her about her career plans. “I have sponsors that I represent, and for me, right now, that’s enough.” But is it enough for her billionaire father? “How you make a living doing that, I don’t know,” the mayor groused when we caught up with him farther down the field. He then added, indulgently, “But we’ll leave it up to George.”