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With Foursquare, life is a virtual game

CNN: "Dennis Crowley was jogging across a New York bridge when he spotted something exciting: a cartoon mushroom, spray-painted on the sidewalk.
It looked like something out of Nintendo's "Super Mario Bros.," which Crowley grew up playing. He stomped on the mushroom as he ran by and had a sort of nerdy realization.

"I was like, s---!" he recalled. " 'I should get a power-up for that!' "

Since that moment several years ago, Crowley -- a 33-year-old who's always in a sweatshirt and wears an eyebrow-length mop of Justin Bieber-like hair -- has sought to turn adult life into a whimsical game. In his world, people should earn points and prizes for making random discoveries like that one."