I know the US and Canada have a strong tipping culture, where you are expected to give a tip of approximately 15% of your total bill after tax. You may even tip up to 20% in cases where you had exceptional service. In UK, no one expects you to tip because the waiters are well paid. In Malaysia, patrons hardly tip but the waiters wish they would. I never had to eat out in Nigeria so I don't know what it's like back home. I want to know from working-class Nigerians, who spend most of their day at work and therefore have to eat at restaurants, if there's a tipping culture?

Hmmm! Nigeria has tipping culture ohh... just that, it is been requested for most times "wetin you bring", "Oga no dey"...
Once your pocket is involved, things get done.
But on a serious note, some have. This is were you can tell who has travelled out of Nigeria.
I see a lot in restaurants, car parks, and shopping malls here in Nigeria.

wen u send a child on an errand, its expected of u to tip him, we expect big brodas back den to leave their change with us....... Thats tipping

Nigerians ordinarily wouldn't want to tip someone that's doing the job they're been paid to do except the person does an exceptional job and out of the kindness of heart the Nigerian decides to tip the person. But most tips are solicited by workers while others are forced(police etc).