I know It is not the point here, but i was a waiter (bamboo bernies in St Marteen for many years) and if somebody tipped me before, i always do the extra service. And he always tip me after also because i am good to get extra tips !

So now i always do that. You get extras all the time.
In sushi Bars, i give also tips when i enter the restaurant to the sushi chef and i often get a extra roll or something like that.
