Most of you who had been traveled to Hong Kong or Japan would have experienced how expensive to order coffee in the hotels & restaurants. With the no refill policy, drinking 3 to 4 cups of plain old black coffee per meal could be very costly.
In Hong Kong, if I wanted to have coffee with my meals, I would go to Dan Ryan Restaurant where my coffee cup was also refilled without even asked.
http://www.hongkongtravelguide365.com/restaurants/dan-ryans.html