Comment by heresie-dabord

> I don't think it is complex.

I'll defer to you of course if you have personal experience that I do not. But would it not become more complex than a "woodworking club" (men's shed) or than a brick mason's guild as soon as a complex filter such as religion is introduced?

> I won't analyze the sexism or male only nature of the fraternity

No need to analyse the usefulness of fraternity (or sorority), I think. It's just a fact that sometimes the sexes don't want to mingle. What could become problematic are cases of gender-fluidity.