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When sitting down at a restaurant in Minneapolis, I noticed the waiter replaced my white napkin with a black one. Apparently the tradition here is that if you are wearing black trousers or a dark skirt, the reasoning is that a white linen napkin might leave visible lint on your clothing so they immediately swap it for a black one. Such careful attention to detail surely develops law8. I wonder how many of these kind of subtle details are managed at finer eating establishments. I looked for a list on the Web and couldn't find anything comprehensive. The closest I could find were references to chilled silverware when serving cold appetizers, but I figure there are a few more subconciously discernable practices in the presentation of a meal out there ... my hunt begins.