Like at the my home, at work my desk is clean, and only has things I require to do work and if I have something else, like tea equipment it sits in the office kitchen not on my desk. I might be a personal preference, but I would hate to collect all kinds of crap on my work desk.

37S is also a smaller company, so I would say that people there regard the whole office as their 'home' or house, not just their workspace. It's designed in a away that you can use the office like your home. You have separated rooms for different tasks and people working there are more like a family sharing a house not like a group of people sharing a space and having their own small private place. Like a family, you don't decorate your common areas (hopefully) by what whatever anybody wants, but more having some style, while allowing personal items in some places.