A club sandwich, also called a clubhouse sandwich, is a type of sandwich frequently served as a double-decker sandwich and generally cut into quarters, requiring three (rather than two) slices of toasted bread held together by frilly toothpicks.Chips or potato salad must be placed in the center of the four equally sized sandwich triangles. The traditional club ingredients are turkey, bacon, cheese, lettuce, tomato, and mayonnaise served on toasted bread.