I walked by this place on my way to Blackbird Guitars in the Mission district. I'd never heard of Whiz Burgers even though they've been around "Since 1955," as the sign says (too small to read in this photo). I assume the name was meant to suggest how fast they could deliver food.
Growing up in Ohio, I saw plenty of hamburger stands of all brands built in this style: a shed roof over one big room with a glass front. Mostly I saw them near strip malls with big parking lots in front.
I never expected to see one shoe-horned into a corner lot in a densely packed urban neighborhood. Other street corners in the area have restaurants built into corner retail spaces beneath apartments.
I guess back in 1955, the city let developers level a corner lot to build their standard model hamburger stand. Somehow, I don't think they would today.
Whiz Burgers is still whizzing along. As you can see, there was a customer at the window when I took the picture, and later folks were sitting out at the picnic tables.