Several days ago, I was one of a party of eight to enjoy lunch at an acclaimed new restaurant in town, RN74. For the most part, my dining companions and I all ordered different things, and even though I'd never met any of them, we had no qualms sharing our courses and even swapping plates.

"There are two kinds of people in this world: sharers and keepers," one of my fellow diners astutely remarked. I thought she was absolutely right — and was grateful that everyone at the table happened to be a plate-sharer. At a restaurant, which one are you?