MTV's "The Real World" is returning to San Francisco for the first time in 20 years.  "Variety" says the show's 29th season is scheduled to film in San Francisco sometime next year for the 2014 season.  San Francisco had been the host city for the show's third season in 1994, introducing viewers to notable cast member Pedro Zamora, one of the first openly gay men with AIDS to be featured on American television.