A lot of people have worked in those environments -- especially when they are younger and have no family attachments. Problem is that businesses are designed to get stuff done, not be social playhouses. So many offices are organized with getting stuff done in mind, and they also want to believe they're all potential massive love-ins as well.
And comedy ensues because in most offices, that misguided, wishful thinking isn't even possible and you just make some of the employees resent each other more.