> Also, Hoboken, NJ is technically two zipcodes.

Source? I've lived here for years and only know one. USPS.gov seems to agree :)

Anyway, re: your first link, the data source sounds very questionable:

  > Scoring of the Top Ten U.S. ‘Pizza Hoods’ in 2016 was determined by internal data on number
  > of pizza restaurant redemptions through Welcomemat Services as well as the number and
  > strength of pizza restaurants and businesses in each zip code covered by the brand

Welcomemat seems to be a company that sends mailers to people upon moving to a new address. In the NYC metro area, those new-address mailers rarely include restaurants. Margins are already tight for restaurants here, and many restaurants can rely on foot traffic without any need for this type of advertising.