> Zoom "happy hours" pretty much get dominated by two or three voices (usually of the most senior people) and everyone else just listens, because you can't have 2 conversations at a time.

This is definitely a problem and my co founder and I wanted to solve it. We tried a bunch of stuff, but one thing that we noticed was that we were playing a lot more casual games with our friends and family since the pandemic. It was pretty enjoyable. We tried the same with our colleagues and it was definitely much better than a Zoom happy hour. The game provides some structure which removes the awkwardness and there is some amount of participation from everyone on the call. We are now working on a product (https://getlounge.app/) that helps teams organize these game happy hours.