Isn’t the grocery store the perfect place to zone out? Grab a squeaky cart and make your way down the aisles. All around you people are going about their business, but you are alone with your thoughts. Families chatter, clerks stock the shelves, small children dart past you. At the front of the store you hear the electronic beep of items being scanned and the crinkle of plastic as they are bagged. Your private supermarket symphony carries you along, serene and undisturbed in its wake.