Music has charms to soothe the savage beast, they say. And also to reduce teenage anti-social behaviour.That’s the discovery of a Chesterfield branch of McDonald's which has started piping in classical music in an attempt to reduce the number of unsavoury incidents. A year ago, the branch on Low Pavement in the town was a hotspot for anti-social activity – fighting, threatening staff and intimidating behaviour. At one point in August 2025, local…