Market segments in NYC

New York City is a huge conglomeration of distinct market segments, most of which live in worlds of their own, with little overlapping.

Internet says: 
The demographics of New York City are evidence of a uniquely large and ethnically diverse metropolis. It is the largest city in the United States with a population defined by a long history of international immigration. New York City is home to more than 8 million people, accounting for about 40% of the population of New York State and a similar percentage of the New York metropolitan area, home to about 20 million. Over the last decade the city has been growing faster than the region. The New York region continues to be the leading metropolitan gateway for legal immigrants admitted into the United States.^[1]
Throughout its history New York City has been a major point of entry for immigrants; the term "melting pot" was first coined to describe densely populated immigrant neighborhoods on the Lower East Side. In 2005, nearly 170 languages were spoken in the city, while in 2000 36% of its population was foreign born.^[2][3] English remains the most widely spoken language and New York is the largest city in the English-speaking world, although there are areas of Queens and Brooklyn in which up to 20% of people speak English only a little or not at all. Neighborhoods such as Flushing, Sunset Park and Corona are the least English-speaking communities.

New York's Five Boroughs at a Glance
Jurisdiction		Population	Land Area
Borough of	County of	1 April 2010 Census	square miles	square km
Manhattan	New York	1,585,873	23	59
The Bronx	Bronx	1,385,108	42	109
Brooklyn	Kings	2,504,700	71	183
Queens	Queens	2,230,722	109	283
Staten Island	Richmond	468,730	58	151
City of New York		8,175,133	303	786
State of New York		19,378,102	47,214	122,284
Source: United States Census Bureau [4][5][6]