I was using a Model M when working in an open office in China. No one really cared, because the guy in the cubicle next to me had a sunflower/watermelon seed habit. Damn, no one should be de-shelling seeds in an open office! Or in the afternoon we would have fruit, and pear day everyone would be smacking and slurping (Chinese pears are much more watery than western pears, I hate pear day!), or everyone talking/arguing/whatever. Turns out my keyboard wasn't weird in what was already a high noise environment.

I had to invest in a pair of Bose noise cancellation headphone a long time ago.