I'm with you, it's like my brain turns off when I'm there, no amount of noise-cancelling headphones can stop me noticing movements in my periphery or the feeling of possible immediate jarring interruptions if I have my back to the room.

I get all my day-work done in the evening, when I'm in the office I just browse reddit or read HN because; unless I'm in a meeting or talking to a colleague- I cannot possibly be productive.

(I _really_ did try to avoid Reddit/HN but after 2 years of doing basically nothing above a 10 minute task I couldn't do it anymore, I was bored.)

And my company still trucks on with an open office policy. :(