Sorry to be a bit of a bore on this but, when I did my thesis for my honours degree almost 20 years ago it was entitled "The Regulation of Alcohol and Social Control, a Case Study of the English Public House"
In it I related the incidence of violent conduct in public house's with and without Juke Boxes, in bars with Juke Boxes the incidence of violence was far greater than those without.(Yes, I did look at the demographics of the clientele) One of my conclusions was that juke boxes, in particular those played at volume, created sitautions were tempers were likely to flair, this conclusion was also arrived at by Prof Michael Smith of Bristol University although I have to admit to meeting and discussing this with him.
Perhaps in the intervening years someone has heeded the wisdom of Prof Smith (I doubt if my thesis has ever been taken of the shelf at Bradford University)and thought to apply his logic in an attempt to reduce pub violence

Just a thought