You are doing it exactly right. Exceptions are when you spend a long time and things (service, ambiance, whatever) stand out to you and your party: then feel w

You are doing it exactly right. Exceptions are when you spend a long time and things (service, ambiance, whatever) stand out to you and your party: then feel welcome to tip whatever you like. But an important observation is that here money is respected. 0,10 0,50 1,00 it is all treated with respect. This is why "overtipping" is frowned upon.