Totally disagree. Making people think of attractiveness connected to money or possessions is the root of many terrible business & Human conduct.
Attractiveness & charm that anyone can reach and should strive for to start with, is listening, paying attention to people and what they need.
You have better business results if the clients or partners feel you "get" them and you won't get them if you haven't paid attention to their words and their pain points.
Your warmth, your body language (which can be worked upon), a firm but not overpowering handshake, your confidence in your subject without being a jerk, using people's name, remembering their lives (family life, name of spouse etc) will do wonders as well.
Lead with grace and people will follow.