It's the backside of a store front in the old section of town. The look of this image with its outside entrance, iron stairs, and air-conditioner hanging from the window takes me back in time some sixty or so years, and brings to mind how this might have been written in the newspaper classified ads of the times.
"FOR RENT: 2nd Flr Rear with A/C. $42. Call SH 5-1234."