Make a left from Harrison onto Merlin Street in San Francisco’s South of Market neighborhood and you enter another world. Past two low-slung, industrial buildings and under a noisy freeway is a scene that has come to define San Francisco: Tents line the sidewalks, and a collection of household items tumble out onto the street. There are cardboard boxes, coolers, overflowing garbage bags, containers of food, grills, chairs, and a pile of bicycles. A huge clock is attached to a chain-link fence and on top of it sits a red toy truck.
