They're frowned on in my full-of-banter-and-music office in London. When i arrived, i asked for a specific new keyboard, and the IT guy, thinking it was a loud mechanical one, said i would have to get permission from my manager before he'd order it!
I've never saw cherry blue switches in the office but browns, blacks and reds are common. While switches themselves don't give loud feedback, keys hitting the keyboard frame are loud enough. No one makes a fuss about it. Not to mention that not all open space offices are that silent. Mine isn't. Not that everyone is listening to a music but chatter can be heard all around.
