The Dream LifeThere are oddities that make sense only in Los Angeles—canary-yellow Rolls-Royces, lasagna cupcakes, agents. The Hollywood Walk of Fame is another. Here is a boulevard where Meryl Streep shares the glory with Erik Estrada; where Audrey Hepburn earns the same real estate as Rin Tin Tin; where a Spider-Man impersonator once socked a Charlie Chaplin impersonator in the face. The Walk