A few years ago I was at a conference at one of the Biloxi Missisiippi Casinos.  The first evening, while sitting at the bar having a drink, I noticed the wife of a friend sitting at the end of the bar, very close to a guy who was not her husband.  Carla and her husband Mike are not really good friends, but more friends of friends, aquaintences who live in the same community. The guy and Carla were close together, and sha...