Hamburger fans are chirping about Red Robin Gourmet Burgers. The company operates a chain of about 515 casual-dining restaurants that specialize in high-end hamburgers. Its menu features more than 20 different twists on the American classic, including the Banzai Burger (marinated in teriyaki), Bleu Ribbon Burger, and the jalapeño-charged Burnin' Love Burger. The signature Royal Red Robin Burger features bacon and a fried egg on top of the beef. Red Robin also serves chicken, seafood, and turkey burgers, as well as vegetarian alternatives. Non-burger entrées include salads, pasta, seafood, and fajitas.