In the Tenderloin, corner stores sell more alcohol than food, drug-addled pan handlers shake paper cups at passers-by and churches vie for real estate with strip clubs. Now, the federal government is on the verge of crowning this neighborhood a place of national historic significance. Each of the area's 410 historic buildings -- flophouses, parking garages, delis and theaters -- now awaits a gold-colored placard, proudly stating its vintage and history. This month the neighborhood's bid for historic district status will be submitted to the National Park Service, following state approval of the designation in July. The Tenderloin will join...