O'Briens is the "Irish sandwich shop" that serves "guilt free food" inside the new Fatburger in Sinan Mansions. It's the same company that owns, manages, and operates both. They do all-day breakfasts including their "Irish Breakfast" (55rmb), which is sunny/scrambled eggs with sausage, bacon, baked beans, grilled tomato, and bread, and their "Irish Omelette" (45rmb), with turkey, bacon, peppers, onion, and cheese. Both fine plates of food. Although, they won't stop you from forlornly looking at the Fatburger section of the restaurant and wondering about roads not traveled. O'Briens also does juice, smoothies, sandwiches, and wraps, all to varying degrees of Irishness.