I often work till the very late evening, which gives me a chance to meet most of the custodial staff. Some of them have very good, eye-opening stories, showing me how lucky I am in life (and I am making waaaay below what I perceive HN folks to earn). It is also a good opportunity to practice foreign languages and to try some foods I haven't eaten before. (I sometimes bring some homemade food for folks who take care of the office and they sometimes reciprocate, even though I do my best to make it clear that they don't have to.)
I would highly recommend trying to get to know the "janitors!"
I would highly recommend trying to get to know the "janitors!"