>We hypothesized that they do this for a higher turnover. I can (anecdotally) confirm that many places do this. One place where my friend worked adjusted the

>We hypothesized that they do this for a higher turnover. I can (anecdotally) confirm that many places do this. One place where my friend worked adjusted the background music volume based on the wait time, and I know of several restaurants by me where the waitresses will say that the music goes up as the place gets busy to persuade people to leave after eating.