At Patisserie Chanson in Flatiron, you're obligated to have your dessert first ( and second, and third): The Rory Macdonald-helmed Dessert Bar serves a six-course tasting menu built purely of dessert items. Stationed in a former speak-easy and gambling school tucked beneath the primary street-level patisserie, the eatery plates each elaborate dish right in front of its patrons.