Spotted: Interspecies grinding. I'm not quite sure who had what to drink at the Advertising Week Opening Gala at Wollman Rink, but at one point there was a cow, a human and a sheep sharing the dance floor. As far as I could tell, the human was the only one drinking. Perhaps that's why the non-ad-industry folks in Central Park stopped to gawk at those down in the rink. It's a wonder, they didn't start throwing popcorn and peanuts into the enclosure.