This is extremely variable upon where you live and the culture of your workplace. For me, most of the places I've worked in SV have had a very active lunch culture where we go out for group lunches and have a nice time and shit talk about our bosses being idiots and where we're all gonna go work next.

I could see it being non-existent in some places though but be the change you want to see. Some people are just waiting for someone else to start it.