It is always a bit tricky to know if you are supposed to tip or not when you get to a new destination. But here is a map that at least can give you some idea what the etiquette is like around the world. You can read more and see comments in the article http://www.mint.com/blog/goals/tipping-abroad-03022011/

Regards
Gard
gardkarlsen.com – trip reports and pictures