All-you-can-eat pizza sounds like a challenge worth investigating. On Wednesday, September 13th, Urban Hearth in Cambridge is cranking up the heat in their brick oven for a pie-in-the-sky pizza extravaganza. For just $18 you can get all the homemade, thin-crust pie (and salad, if that’s your thing) you can eat, plus beer, wine, and kid-friendly beverages at regular menu prices. There’s a $45 cap for families with kids 12 and under, and three seatings at 5:30, 7:00, and 8:30pm. For more info or pizza-related queries, call 617.682.7295.