Finagle a Bagel in Boston does run a close second, and in DC, I like to hit up Bagels, Etc in Dupont Circle, pretty legit.
But what cracks me up these days are the Announcers at the US Open calling out Serena Williams, Rafael Nadal, and Andy Murray, just to name a few, for "Serving up bagels" meaning a scoreless set for their opponent, 6-0.
Classic New York.