Don't be fooled.

Psychologists employed by the big supermarket chains study the reactions to music played in the shop and taylor the music to the customers in such a way as to make them more likely to spend. It doesn't always work but works often enough to make it worth the effort.

Muzak, the company that gave its name to piped music in shops recorded their tracks not at a steady tempo but at slowly increasing tempo so that someone who was relaxed would be unconsciously made less relaxed with the hope that they would become slightly flustered and make purchases that they didn't really intend.

I'm pretty sure they have some more tricks up their sleeves but that will do for starters.