Brett's Casual American is located in Athens, United States on 3190 Atlanta Hwy. Brett's Casual American is rated 4.6 out of 5 in the category restaurant in United States. At brett’s, we are committed to a high quality meal in a fast-casual experience along with great value. Our menu items are designed and managed by Chef James Ellis along with owners, Leslie and Brett McCullough.e all of our spices, marinades, dressings, sauces and soups in house, from scratch. This creates tastes and flavor combinations you will not find anywhere else! Menu items include fresh salads, sandwiches, tacos, crispy quesadillas, grilled seafood, chicken, hand cut steaks and TexMex specialties.ning atmosphere is comfortable and casual, with pleasant décor and beautiful scenic landscape photography from a Pulitzer Prize nominee. We also feature flexible table seating, booth seating and open patio seating to enjoy the beautiful Athens weather.