I remember seeing this on the news a few years ago. If I remember right, they were interviewing a design firm that does interior design for fast food and fast casual restaurants, and they were talking about all of this. I was really surprised at how candid they were being, since you would think that they would want this to be an industry secret.
The high stools with no back, the music that is too loud, the lights that are a little too bright and kind of hanging down in your field of view: all intentional, so that you're just ever so slightly uncomfortable and you leave a few minutes sooner.