The library example is an interesting one to me, because my personal productivity in libraries varies drastically depending on the layout.<p>In college, the libraries where I ended up reading and working were impressively tight, vertical, and often almost claustrophobic [1]. Carrels aren't offices, but the ones I used practically were: there were always walls of books all around each one. The libraries also had big open rooms (similar to the pretty U of Chicago photo superuser2 linked to), and I tried working there a couple times, but even to go into those spaces was supremely uncomfortable for me. It wasn't noise: even if there wasn't a soul in the whole library, I wouldn't go there.<p>I recently quit my job because they moved to an 'open floor plan'. I just don't think I'm wired to work in flat open spaces. Right now I'm working from home, and though my apartment isn't big, somehow I naturally ended up with walls and (medium-to-tall) furniture surrounding me on 3.5 sides, less than an arm's length in each direction.<p>[1]: <a href="http://3.bp.blogspot.com/-CjyKC0qYp78/TaZz0lPFUyI/AAAAAAAAANU/jvbN1e7qYlM/s1600/UrisLibrary.jpg" rel="nofollow">http://3.bp.blogspot.com/-CjyKC0qYp78/TaZz0lPFUyI/AAAAAAAAAN...</a> -- other carrels were even more isolated, but not as photogenic.