Desserts are getting the nightclub treatment at Sugar (312-822-9999), the new Chicago club that underscores the sin in sweets. Paired with dessert wines and martinis, brûlées, soufflés, and other finales marquee the menu. Could the trend be catching? Chicago eatery One Sixtyblue (312-850-0303) recently introduced a “cocoa bar” menu in its lounge, and in Dallas, trendy Umlaut (214-742-2368) serves sweets from its new chocolate menu. What a delicious date.