John Catsimatidis is a player in two of the favorite realms of New Yorkers: food and politics. In addition to owning the Gristedes supermarket chain, the Greek-born magnate flirted with a run for City Hall in 2009.

The son of a busboy, Greek-born Catsimatidis (it's pronounced Cah-tsee-mah-TEE-dees) grew up in a tenement in Harlem, moonlighted at his uncle's supermarket during college, and dropped out of a graduate program in engineering at NYU to open his first Red Apple supermarket at 87th and Broadway in 1968. Eighteen years later, Red Apple had grown large enough to acquire 36 Gristedes Brothers Supermarkets, giving it a grand total of 75 supermarkets, more than any other chain in the city. While Catsimatidis's supermarket assets aren't what they once were, these days his Red Apple Group has interests in a wide variety of other businesses, from oil refining to convenience stores to real estate and aviation.

Catsimatidis has long been a big-time Democratic fundraiser—he's raised money for Bill and Hillary Clinton, Al Gore, and John Kerry—but in the fall of 2007 he switched his affiliation to the Republican party, part of a plan, most assumed, to run for mayor in 2009. Catsimatidis briefly flirted with the idea in early 2009. But when Mayor Bloomberg successfully extended term limits and positioned himself to remain in place for a third term, Catsimatidis abandoned the idea. [Image via Getty]