We were just having a discussion yesterday at work about this. A co-worker saw a tip jar by the till at a gas station! Yes, we pump the gas ourselves, and either tap to pay or go into the store. We all agreed that this was ridiculous.
The American style tipping culture is trying to sneak into Canada, but a lot are not falling for it. Our service workers are paid a minimum wage, and I think the standard for restaurants is 15% for good service. Hairdressers, nail salons, taxi, I think these are fairly standard tipping practices in UK as well as here.
We have noticed at most point of sale tap machines, an option to tip is set for 18% and 20%, with an option to change (which I do).
Vintagenonna, I have heard of people being chased down for tips in the US, and find it shocking. I think a worker here would be fired for that behaviour.