Hamburger depot?
Latest item at KSHS is another small railroad building, but I'm NOT going to include this one in my digital models.
Santa Fe depot at Cushenbury, Calif. Looks like it was newly constructed when the pic was taken.
Without the description, there's no way you'd connect this building with railroads. It's a roadside fast-food outlet, or more specifically the projection booth and snack bar of a drive-in theater. Did Santa Fe borrow the blueprints from a drive-in?
Here's a Googlestreet that seems to be the same general area, with a possible old grade on the right. Desert, lots of mineral and gravel action now using the highway instead of the railroad.