Once upon a time, it was unusual to even ask dinner guests about food allergies, let alone their preferences. Today, it can seem strange to have a dinner party without some sort of food restriction. Paleo, vegan, no carb, no gluten: sometimes planning a menu can require research into what these diets mean exactly. Fortunately, specialty food like gluten-free flours and vegan meat substitutions are much easier to find. But where to draw the line before you're practically making individual meals for each guest? The New York Times asked this question this past week — see what they had to say.