Bon Appétit readers may remember the "Entertaining at Home" articles: Buffy and Chip invite their dashing and witty friends over for a casual dinner in a Manhattan loft. Or in their Long Island farm house. Or their Swiss chalet. Back when we subscribed, we daydreamed about the perfect life depicted in those features. We eyed the Smoked Trout with Cucumber-Watercress Cream and thought that maybe if we made it often enough, we could conjure......