Hi, I work as a waiter in a restaurant. Have you ever worked as a waiter?
No but I do appreciate their role in a restaurant which is to always be attentive and accommodating to the customers.
I see, what sort of tasks do waiters do?
They attend to customers in a  restaurant or a bar and supplying them with food and drink as requested.
Do you know how many waiters there are in the U.S.?
Yes, The Bureau of Labor Statistics estimates that, as of May 2008, there were over 2.2 million persons  which are employed as servers in the U.S.
That is a lot of people. Do waiters mostly work off tips?
No. They most time receive tips as a minor or major part of their earnings, with customs varying widely from country to country.