Not sure how tongue in cheek you're being, but for those for whom English isn't a first language, calling a large city like DC or NYC a 'town' is pretty common, and is a more colloquial way to describe a region rather than to indicate the size of the named region. Often it is used interchangeably with 'place', for instance: "I've lived in New York City all my life, I've got to get out of that town."