In business it is no longer male to female, but professional to professional. This does not mean that you cannot open the door for ladies. I think that opening a door is great for anyone. In the North American culture that is very common. If you do go first to help get the door moving, say, let me get the door “going” for you; I am sure she (or he) will appreciate that.
To learn more about CHUVA group’s Business and Etiquette Protocol programs click here.