If you want your remote teams to have increased cohesion you need to fly them all to the same location (at company expense, only during weekdays) multiple times

If you want your remote teams to have increased cohesion you need to fly them all to the same location (at company expense, only during weekdays) multiple times per year and give them the opportunity to actually get to know each other. Anything else usually just feels awkward and pathetic. But since online game shows or "breakaway rooms" cost the company a whole lot less money, that's what we're stuck with.