Yes - some people are very, very social. There are a good number of people that have drinks towards the end of the day - like any other office-y environment, you just need to take the leap to talk to people. Of course I've seen people here who never speak to anyone, but the larger percentage people do talk.

Personally - I'll come in, say my good mornings to the people I know, sit down and put headphones on and power through. Occasionally I'll go make a drink, where I may have ten minutes of screen break / water cooler chat. There's proper 'social' drinks once a week, and probably 1 or 2 other 'events'. At the drinks especially it's easy to just say "hey" and get talking. It's easier if you're a hotdesker and you see that face every day. Otherwise you'll bump into people throughout the day. You just need to chit chat - "Hey, that smells good, what is it?" / "Sorry, can I just grab the milk from behind you? ... I don't think we've met before..." etc.

I gotta say it was invaluable to me - I had maybe 5 years at home beforehand and I'd be bouncing off the walls by 6pm. Social interaction, even lightly, is very beneficial.

Hope that answers your question!