The Center for an Urban Future just released a report with the kind of data we get asked for a lot: how many outlets of ____ (fill in the blank with some national chain, like Dunkin Donuts, Starbucks, McDonalds, etc.) are in New York (or one of the boroughs. The report, titled "Attack of the Chains?" lists the numbers for more than 150 retailers.
Fun factoid: in New York, there are more Sleepy's (105 outlets) than Burger Kings (92 outlets).