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Theo's is a Montrose restaurant that wears many hats. Previously named Biba's One's A Meal, the restaurant is a Greek place that's known for its Italian pizzas, that serves late-night American breakfasts and that promises to be open at all hours, all of the time. Because like its neighbor, Katz's—which famously "never kloses!"—it's a 24-hour place to sate your calzone cravings. Here now, check out the menu of calzones that are available 24 hours a day: