The walk from the Union Square hotels in San Francisco to the Google shuttle stop at 8th and market is straight through the Tenderloin. At 7 in the morning, while I have just gotten up, most of the action on that walk is on their way to bed. It's a walk of being accosted by drug dealers, addicts, and worse. It's not usual to see people laying on the street shooting up or smoking a crack pipe. It's a little piece of Hell in what is otherwise my favorite city in the U.S.
So while looking at a map of San Francisco I saw this related map someone had made of Safe Havens in the Tenderloin. However, it says they are for kids, elderly, and the disabled, not just a guy who grew up in a rural suburb in Illinois. I guess I'll just keep walking fast.
View Safe Haven Sites, The Tenderloin in a larger map