Sherman Oaks, California-based Worldwide Restaurant Concepts, has announced that Robert Holden has been promoted to president and CEO of its Pat & Oscar's division.  Holden, who joined Pat & Oscar's last year as COO, will assume his new responsibilities immediately. Charles Boppell, president and CEO of Worldwide Restaurant Concepts, formally known as Sizzler International, commented: "Holden has 18 years of experience in the restaurant industry. He's held a broad range of operations positions at leading casual dining concepts, including Johnny Rockets, El Torito, and Panda Inn.