MANHATTAN: FLATIRON DISTRICT shows residential growth amid plethora of shopping, nightlife. By Wendy Lu. November 17, 2016. The Flatiron District is known as a prime destination for shopping, nightlife and offices for tech startups, but what many don’t know is that the nabe also has a growing residential community. The district is known for its booming commercial hub and iconic architecture, from the MetLife Tower to the Grand Madison on Fifth, to the Flatiron Building itself.