The cup of tea, yes we still get offers of cups of tea every day but I have to say not as many as years ago. Some people just do not offer you any. Maybe times are changing and old traditions are dying.
I never take the tea for the sake of drinking it, thats is not important, but what is important is to use the time to talk to your customers and let them feel that you are genuinely interested in them. That is one of the ways to build up repeat business.
I always like to think on that cup of tea as a "cup of conversation" instead.