I’m watching Hello Dolly, and at the beginning of the film, Dolly is surrounded by young men in handlebar moustaches, buttoned up trench coats, and top hats, midday. It’s an odd look, because I’ve only ever seen them worn as protection in bad weather, in the mid-20th century. And they seem to contrast the formal look of the top hat. The trench coats are buttoned up so tightly, I’m not sure if they have anything underneath besides trousers!

And it’s certainly not normal clothing as I understand it for the era, with stiff collars, vests and ties. (Source: old relatives and friends I knew who lived in that era)

I was just wondering if this was some look worn by hooligans of some sort in the era.

Photo example attached. https://imgur.com/a/VBOS9mm