A lot of people say colonialism was 'evil' or whatever, but what have they really done with Africa since we gave it back to them? I don't think it should be considered 'racist' to admit maybe ending apartheid did more harm than good in South Africa.
In New York, we tip everyone. We tip doormen, we tip cab drivers, and we tip bartenders at the bar. You'll get quite an evil eye if you don't leave a tip at the bar.