Gender etiquette plays a significant role not only in business but overall in foreign travel. In some countries where gender is rooted in the tenets of a particular religion faux pas are often considered unforgivable.
For example in the Arab world shaking hands is mandatory in a business setting but touching woman in traditional western dress is forbidden. In India man and woman shouldn't make physical contact in public other than handshaking. In Japan older generations may not be comfortable shaking hands with Westerners and it's important that you don't get too close to them. In Argentina women should initiate handshakes with men.