I hate when people mention "watercooler chats" - not you, of course, but the clueless leadership/HR people that come up with this. Last time I heard it, it was: "the best ideas sometimes come from a watercooler chat, so we need to have people in the office".

I've worked in offices for decades. While every now and then I'd see watercooler chats that were related to work instead of sports/bitching/weather, they never remotely compared to "ad-hoc whiteboarding chats" or "team area chats". Most Engineers I know, myself included, need focus and a space for impromptu conversations with a group of Engineers, preferably away from PMs and salespeople.

If the people advocating "watercooler chats" really wanted to make Engineers productive, they would kill open floor offices and give Engineers privacy for long spontaneous technical conversations with other Engineers.