Marissa Mayer is throwing around money like Marie Antoinette

Yahoo’s $7 million end-of-the-year bash at San Francisco's Pier 48 was one for the books. Aerialists swung among chandeliers, pouring Champagne, while a burlesque troupe tantalized the Silicon Valley crowd. There was a white Rolls-Royce parked inside and cigarette girls peddling candy. In a roped-off corner, Marissa Mayer, the company's president and CEO, perched like...