Home THIS WEEK IN The Tenderloin A Peoples History of San Franciscos Most Notorious Neighborhood Few San Francisco neighborhoods have had more ups and downs than the 33block area still called The Tenderloina name which derives from the late 19th century police practice of shaking down local restaurants and butcher shops by taking their best cuts of beef in lieu of cash bribes. At various periods in its storied past the Tenderloin has been home to famous brothels Prohibitionera speakeasies San Franciscos first gay bars wellknown hotels and jazz clubs film companies and recording studies and professional boxing gyms. More Plastics in the Worlds Oceans and Food No Longer an Invisible Killer How pervasive is the plastics threat. An estimated 60 of all sea birds and 100 of all sea turtles have ingested plastic.