Cook 16 ounces spaghetti, 16 ounces rigatoni, 16 ounces rotini, and 16 ounces cavatappi according to the package directions until al dente.
Drain each pasta separately and toss with a small amount of olive oil, if desired, to prevent sticking.
Place the cooked spaghetti, rigatoni, rotini, and cavatappi into four separate large serving bowls.
Heat 24 ounces marinara sauce, 24 ounces Alfredo sauce, and 8 ounces pesto sauce according to your preference and transfer each sauce to its own serving bowl.
Place 2 cups cooked diced chicken, 6 ounces diced pepperoni, 2 diced tomatoes, 1 cup grated Parmesan cheese, 1 cup shredded Parmesan cheese, and chopped fresh basil into separate serving bowls.
Place a serving spoon in each bowl and arrange all of the pasta, sauces, and toppings on a table or serving area for easy access.
Allow guests to build their own pasta bowls by choosing their favorite pasta, sauce, and toppings.
Serve immediately and enjoy.
Notes
You can easily add in your favorite toppings to make this pasta bar your own.