Eating at a restaurant is an experience, more than just food (although food is obviously a key element in that experience). So the choice and volume of music should be a conscious choice of management to create an ambience to attract their target audience to develop the most traffic to make the most money, whether that is encouraging a quiet leisurely mean or encouraging a boisterous atmosphere and/or encouraging table turnover. Personally, JJ's loud music would sene me elsewhere for my sammies.