For some reason those whom I worked with who were choosing to work in such places usually were also not overly sociable. I have, of course, at least one example of a person who works at home and is self-admittedly antisocial, but the correlation is still there.

I have this one friend who only really uses his tiny apartment for sleep and other basic stuff. He works at coffee shops and doesn't cook even though he's good at it. Getting to know this guy was a lengthy and laborious process.