A club sandwich, also called a clubhouse sandwich, is a sandwich of toasted bread, sliced cooked poultry, fried bacon, lettuce, tomato, and mayonnaise. It is often cut into quarters or halves and held together by hors d'œuvre sticks. Modern versions frequently have two layers which are separated by an additional slice of bread.The origins of the club sandwich are unconfirmed, and the subject of some debate.