Pattern one
The room of drivers
Everyone drives, nobody rides. Meetings are loud, fun and circular, because the room competes for airtime instead of building on it. Groups where speaking turns spread evenly think better together, and problem-solving groups do best with some extraverts, not a room full of them. [6][10]
What to do: Put structure where volume used to be: written proposals before discussion, a rotating chair, explicit turn-taking in decisions. The quietest voice here is not the least valuable one, only the least heard.