Jack. It is certainly an enigma.
My specific example was thinking of the Volunteer in Sidmouth. At lunchtime the bar is full of mainly Trad singers and a sort of house band doing the odd tune. In the evening the other bar does a similar thing. But, in the back garden it's a bit more like a mixture of local bands/open mic thing. All seem to sit happily with each other. And in the Vollys defence, The pub survives the rest of the year on the takings from the Festival. It would have shut years ago without it. And I've never noticed any binge drinking there. As I say, every venue is different.