Re: Tip a Pizza guy...
At least in the states, 15% for eating out is standard. I was a waitress... usually they make less than minimum wage (I made $3.09, before taxes) because they're expected to make up for it in their tips. Tips really ARE servers livelihood. Without them we do not eat. Notoriously bad tippers are kept in mind- chances are you will not get as good of service if you are known to be a bad tipper- though I never saw anyone spit in somebody's food, though more than one person has wanted to do it!