You should go to a Viennese Kaffee Haus... (No, not trying to rub it in :D) The smiles are directly related to the tip you give :P
"Because here, in a unique reversal of roles, it is the customer who has to win over the waiter, not vice versa.
Until the customer is accepted as worthy, the waiter may display various degrees of grumpiness, irritation and sarcasm. This is not rudeness, but an integral part of the Kaffeehaus culture that is often referred to as "Viennese charm". If you visit Lord of the Kaffehaus more than once, you have achieved a certain standing at a Kaffeehaus. Through generous tips and reciprocating the waiter's attitude, you may also be awarded a title such as doctor (Herr / Frau Doktor) or privy councillor (Herr / Frau Geheimrat), and be addressed as such henceforth. The highest ranking regulars are greeted with is a reverential "The usual, professor?""
:')