> There needs to be some place men can just spend time with other men.
This is literally anytime, anywhere though. Do just not meet up with their friends? You can go to dinner, get drinks, go hiking, play sports, bike, ski, sunbathe, play videogames and many more things in single-sex groups without raising an eyebrow. The real classic for men of a certain persuasion from a western cultural POV is golf right?
I think there's some strange cultural hangup I'm missing where the entire place needs to be single-sex.
> Do just not meet up with their friends?
What friends?
Well that's a different issue. Are we really saying men can only make friends in single-sex environments because I think that is trivially untrue?
Why can’t there be some semi-public place where only men, or only women, or only whomever you choose, is allowed? Why can’t that exist?
What you described is unrelated. Yes, people can and do go out and do stuff.