Hello Fester, We all know that you a not meaning what you write. However, on a much smaller scale, this used to actually go on in the coastal towns of North Wales, Rhyl in particular.
It was well known that on a Saturday night fights always broke out around the fairground area between the locals and the lads from up in the hills, Llansannan. Cerrig etc. Another good place for a punchup was the Colwyn Bay pier bar.
It was also well known that the Police didnt rush in at the first sign of trouble. If it was outside any premises they often took a standback for a bit so that they use up their energy before we move in approach. Mike