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What do you mean no-one tips? I can't think of a single person who doesn't tip, except when the service is really fucking awful.
What kind of restaurant did you work in where ppl didn't tip? Were you just crap at your job?

No need to get fiesty. Yes most people here tip 10% in restaurants, and maybe even pubs if they eat, but virtually never at a bar or in other areas of hospitality. In most cases now it's a service charge from which the kitchen/servers see very little. In Canada you get tipped about 20% at restaurants and table service bars and about $1 per drink if your serving at a late night bar/club. Tour guides, bellmen, cleaners, pretty much every service job is rewarded extra cash in some way. You can take home $100 a night at a restaurant and double that in a bar. The wages are miserly of course, but no more so than here for the same work.
Soooo, maybe what I should have said is please warn her not to expect a similar standard of living here if she wants to work in hospitality. It's very much hand to mouth - something to think about when you get your next bill and the food/service has been good.