And woe to those who need to take a conference call with multiple of their desk neighbors but no conference rooms are available. Nothing like a bunch of people all sitting next to each other talking on the same phone call.
Why companies would implement an open office without a plethora of private meeting spaces is beyond me.
3/3 found that the meeting rooms were inadequate before they even filled the open floor plan seating.
Open floor plans mean meeting rooms become mandatory for just about every interaction. The promised ease of interaction doesnt happen when everyone is in headphones and the polite people dont want to talk while in close quarters with others NOT in the conversation.
As you said, when everyone has an office, only meetings of more than a handful of people need a separate conference room.
I've never had any problem making a phone call in an open office.