In terms of clothing though - I always think of the beats as being a scruffy lot.
I think, sometimes, there are some tricky balancing acts to be performed; which I largely now avoid; not invariably. I'm sure GG once talked about 'frumpishness' as part of The Look. He may correct me if I'm wrong. I think there's something in that. I still think of The Look as 'square'. No, don't laugh. Anti-mod? JS gets the balance right effortless; so does GG from the little I've seen him in 'real life'. Not sure I've ever seen an actual beatnik, just rather grubby-looking boho types.