Yeah, it seems like a "Silicon Valley" thing. The whole thing seems quite mysterious to me. I worked in (4) random cities in the UK. But even in London, I didn't notice a scene.
Maybe its also a thing more with web development and start ups. Where the whole company can be mostly tech people, and where most people are young (so socialize outside of work more).
Maybe its also a thing more with web development and start ups. Where the whole company can be mostly tech people, and where most people are young (so socialize outside of work more).