Dining Outside the Home: Duetto Pizza and Gelato in Key West, Florida! Just a stone’s throw off Duval Street is a cozy Italian eatery that serves New York-style thin crust pizza by the slice. Because a single slice can be bigger than your hand, you may see people folding it in half, especially if they’re peddling toward the beach or heading over to the waterfront pier. No judgement. If it keeps one from burning the roof of their mouth on the gooey cheese, I’m all for it. Whatever you choose, save a little room for fresh gelato. It’s made daily with milk, real fruit, and natural ingredients. No wonder it tastes so good.