"Optimal teamwork" = filling your day with meetings meetings and more meetings!
Aka "You won't get shit done because person B saves five seconds by asking you and costs you 5 minutes by them asking while you try to remember what you where doing".
Been there, done that, never again.
Yeah, if it happens once. Context-switching is cumulative. 5 minutes for the first disruption, 10 minutes for the second, 30 for the next, and you just quit working after the fourth.
Co-present team members can often sense when a question is most welcome – fitting them into the day's normal interstices – or learn enough via ambient observation that many questions aren't even necessary.
I hate open plan offices so much..
If it makes having meetings easier (by minimizing setup/teardown) it's more likely to cause an increase in the frequency of meetings.