Beer Girls

I was at a "steam boat" place in Hong Kong today and I noticed that there was a sexy beer girl pouring beer. It made me wonder.. we have the same shit in Malaysia and Singapore too.. why ah? Isn't this a great example of "cross selling" and "marketing"? I'm like.. if you are in a small town, actually the beer girls are quite ugly ah mahs.. but yet.. it still works! Why ah?