Retail shopping centers may include department stores, variety stores, supermarkets, furniture stores, household appliance stores, home improvement stores, lawn equipment stores, gift shops, restaurants, including drive-in and drive-through restaurants, drugstores, barbershops, beauty shops, office supply stores, food stores, optical stores, clothing stores, financial institutions and banks (with or without drive-through windows), health clubs, movie theaters, doctors’ offices, dentist offices and other professional offices open to the public, children's day-care and activity centers. Only one principal building per lot is allowed.