This infamous strip joint remains open, long after one of the founding brothers murdered the other. Jim and Artie Mitchell opened the theater in 1969 and began making porn, including the legendary Deep Throat, starring Marilyn Chambers. At its prime, the Mitchells' multimillion-dollar empire included a production company and 11 California theaters. But the Mitchell brothers went the way of Cain and Abel, when Jim shot and killed Artie in 1991. He was convicted of voluntary manslaughter and served six years; a heart attack killed him in 2007. Despite its tawdry background, the O'Farrell Theater is generally regarded as a classy place (with a capital k). Even if you don't go inside, ask to see the little porn museum just inside the door.