Originally a small antique store which sold sandwiches to customers in between dealings, Potbelly Sandwich Works has become much more. It now offers a range of traditional sandwiches, such as turkey, ham and roast beef, as well as popular favorites such as the pizza sandwich and the vegetarian. On a diet? Potbelly also offers "Skinnys," which are 25 percent less fat than originals. Those who are super hungry can opt for "Bigs," which are 30 percent more. Potbelly's also offers catering.