Toast the bread in a toaster, or under a broiler on both sides. Cut the lettuce leaves in half crosswise and form into 8 neat stacks.
To make a double-decker club: On a clean work surface, arrange 3 bread slices in a row. Spread 1 tablespoon mayonnaise over 1 side of each bread slice. Place a lettuce stack on top of the first bread slice, top with 2 tomato slices, and season with salt and pepper, to taste. Place 2 slices bacon over the tomatoes (broken to fit neatly if necessary) and top with 1/8 of the turkey (without letting any hang over the sides). Season the turkey with salt and pepper, to taste. Repeat with the second bread slice. Carefully place the second layered bread slice on top of the first layered bread, turkey side-up. Cover with the third bread slice, mayonnaise side-down.
Pin the sandwich's layers together by piercing them with 4 frill picks or cocktail swords through the top bread slice, in 4 places in a diamond-like pattern, all the way to the bottom bread slice. Repeat entire process with the remaining ingredients to form 3 more sandwiches.
Using a serrated knife cut each sandwich, diagonally, into 4 triangular pieces (each piece should be secured in the center with a pick or sword). Serve with potato chips and pickles.
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