Team sized rooms are definitely the way to go. You can avoid conversation from other teams that you don't care about. When there is a conversation in the room, it's probably related to what you're doing so it's not necessarily distracting you.
I worked in a room with just my team and it worked out great. We were able to have discussions and draw stuff on white boards on the wall without distracting anyone else. It also helped with team bonding.
I worked in a room with just my team and it worked out great. We were able to have discussions and draw stuff on white boards on the wall without distracting anyone else. It also helped with team bonding.