John has some excellent points. I grew up in retail. I learned early on that the best way to make women feel welcome as customers and keep their business is to treat them the same as I would a man.
In other words as an intelligent, capable, and valued customer. That's what keeps them coming back.
I never use terms like honey, dear, darlin, etc. Those are demeaning and disrespectful. When talking with them I always assume they understand what I am talking about unless THEY TELL ME otherwise.
In training there is no need to be coddling or condescending. Most of the females I've worked with are better students than the men. They don't allow things like ego to get in the way of training. If they realize they don't know something they are more likely to say it. In that way they are more courageous than the guy who doesn't know but is afraid of looking foolish. I have had some who thought that by appearing to be on the frail and meek side that they could get special treatment. Sorry. Not happening unless you are actually physically compromised. You'll carry your own tank, assemble your own gear, and your BF, husband, son, etc. is not going to do those things for you.
As far as gear goes, most of my female customers don't want pink. The shop I send my students to for wetsuits and personal gear has as many wetsuits in different sizes for women as it does for men. In fact right now I think the women's selection is better size wise.