The format is the draw: you walk a block, hear a folk duo on a stoop, turn the corner, catch a rock band in a driveway. The acts range from neighborhood regulars to working bands using it as a low-stakes show. Because it's distributed across private properties, sound quality and crowd size vary wildly by block — that's the point. Food is on you; 24th Street has options within walking distance of most of the action.

Practical note: BART to 24th Street Mission (16th Street also works depending on which cluster of venues you start with). Street parking on a Sunday in the Mission is a lottery — walk or bike if you can. Pull up the live map before you leave the house and pick two or three venues that are geographically tight so you're not zigzagging the whole neighborhood.

If you have two hours: drop a pin at one end of the map, walk toward the other, stop wherever sound is coming out of a yard.