simple, but complicated
I've long considered making my first dojo in the US a "men's club," primarily because it would eliminate a lot of issues that crop up between men, women and teachers during the course of training. I think that a single gender dojo can keep people more focused on training.
On the other hand, this would open up another problem as some would see this as a kind of bias.
I've yet to conclude what I shall do. Maybe, in the end, I'll just stay home and practice tai chi chuan.