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Secret Menus Give Restaurants A Not-So-Secret Boost

In-N-Out Burger has long been known for its secret menu, featuring options such as "animal style" fries, "3x3" burgers and Neapolitan milkshakes. (istolethetv/Flickr)
In-N-Out Burger has long been known for its secret menu, featuring options such as "animal style" fries, "3x3" burgers and Neapolitan milkshakes. (istolethetv/Flickr)

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