Keri Russell, Matthew Rhys, and Jon Hamm Attend the Brooklyn Black Tie Ball

It’s been said that Brooklyn is the new Manhattan, but there are still plenty of long-running jokes about the differences between the two boroughs as well as their distinctive inhabitants. Even those who don’t consider themselves Brooklynites or Manhattanites—or even New Yorkers, for the matter—are well versed in the rivalry, which is always done in good fun. Take Jon Hamm, for example, who last night hosted the Brooklyn Bridge Park Conservancy’s annual Brooklyn Black Tie Ball at Pier 2 in Brooklyn Bridge Park. “It’s a fundraiser for Brooklyn, so let’s get that guy famously from St. Louis,” he joked onstage before rattling off a few Brooklyn neighborhoods that are never confused with certain corners of Manhattan. “Is there an Upper East Side?” Hamm playfully continued. “I honestly don’t know that much about it, but I know one thing—that I’ve been coming here for over 20 years, some very good friends live in the neighborhood, and to see the transformation of what’s happened over the last few decades is truly astonishing, and that speaks to the work of the conservancy.”