As a Brit who used to work in New York, for an investment company, I have a different view. While I agree my US fellow workers are very sociable during the day, they do tend to run off 5pm sharp! There's no "go for beers after work" environment. I spoke to them candidly about this and they said their real friends are the ones they grew up with and tend to hang out with them. I also had a colleague at HSBC and another at JPM who also expressed the same view, but added that's why brits do well over in the states because they are used to working longer hours and this appears favourable to the bosses.

Anyway, not trolling, just thought relevant.