>This may just be my experience as a young person in San Francisco / Silicon Valley, but it's very common for office life and social life to be highly intertwined.

Damn, I've seen some random ass video on yt called "normal day of Googler" or something like that and it shocked me hard that "normal day" meant hanging out with coworkers

Don't get me wrong, it's not like we don't do it "here" - like going to pub or something, but it's definitely not normal day.