When a "Man Town" Turns Into a City

In American culture there exists a phenomenon called the “Man Town” or “Man Cave” that often takes the form of an office, den, garage, or media room. My household is no exception as my celestial sex partner has a room of his own where he's picked all of the décor and can do those things that interest just him, i.e. video games. This is also true for my parent’s house where my dad has an office, junk-stuffed garage, a shed even more packed, and a greenhouse- same for my grandfather, same for my brothers-in-law. Recently I’ve noticed these Man Towns have a tendency to populate, leading to an urban sprawl that spills over into other rooms. Am I alone in my observation? I know a few female friends who have their own rooms, usually for crafts and scrapbooking, but by and large, it’s usually the men who have their own space to lounge. Why do you think this is? Could it be some holdover from the 60’s? Do women not feel they are deserving of such a space, and when a new baby comes, why is it their space that is most likely to be sacrificed?