While some favorite toppings around the United States include sausage, peppers, mushrooms and onions, pepperoni is the most popular. Pepperoni is a topping added to 30% of all pizzas made. Dominos offers many toppings on its pizzas including ham, bacon, grilled chicken, black olives, jalapeno peppers and pineapple. Try the IU Slam to get one medium, one-topping pizza, your choice of bread product and a two-liter of soda. Dominos has two locations: one on the north and one on the south end of Walnut Street.