Yeah yeah, America...one of very few countries in the world that actually tips. But some of those examples seem to be bribery though. When I went to other country, it felt weird not to tip anyone for their service. lol
But I noticed, perhaps because of my family, tips become a bit bigger during x-mas season. Also that we tips good because some of family members worked as waitress. This brings us different perspective of how hard they work to get tips.