We also have a team-wide monthly "happy hour" where we bring one discussion point each, usually an interesting article. They're a lot of fun, and I appreciate my colleagues in a much more rich way than I would have otherwise.
It's so obviously important that we maintain semblance of community through live conversation in remote workplaces. I spend more time "with" my remote colleagues than I do with anyone else in my life, including my wife. The human brain does not separate cleanly into "colleagues" and "friends".