It seems to me that most offices would benefit from having a sensible balance of both genders. For whatever reason, women tend to have a different approach to problem solving than men, which might add value in itself. It might also motivate people to be a little bit more aware of certain aspects of coexistence that are often somewhat neglected in an all-male office - IOW it might make the office-atmosphere a little nicer.
I doubt it. The modern office workplace today is entirely asexual. It's quite the opposite of "Mad Men" (a depiction of office life that I doubt anyone wants to restore). The ideal environment for HR and the lawyers is one entirely blind to anyone's gender. Get rid of the gender labels on the bathrooms, for god's sake, it's causing too many issues. Don't comment on anyone's clothing or hairstyle, don't even mention whether someone is male or female, that's the way. Office romances, once a stable of work life, are horribly verboten. We can't have Dan from accounting asking Doris from Marketing out for a date. Don't even extend an invitation to lunch - harassment is a wrong glance on an elevator these days.
So when you go to work, dress androgynously, speak to everyone in the same monotone voice, and for crying out loud try to forget that all these people are humans and sexual beings. It's dangerous.