In NYC, you can have a celebrity sighting every day. It all depends how you define "celebrity." For example, I recently saw NY1 newscaster Roma Torre in Chelsea Market. The offices of "the only local news worth watching" happen to be in Chelsea Market, and a local-news newscaster is by definition only a local celebrity, making this sighting worth fewer points than, say, randomly seeing a buzz-cut-sporting Natalie Portman in the East Village. But it still counts. As does spotting (and chatting with) a bona fide Social Thought grad student in a pizza place on the Upper East Side. Social Thought grad students, they're just like us!