Tipping is a non-sense...
You go a restaurant in Europe ask for a steak and a bier and you pay what it says on the Menu: 20 euros stake + 4 for the bier, u end up rounding to 25, so u tip 1 euro
You go to the US, the menu says Stake 20$ and Bier 4$, then comes the check and instead of 24$, u see tax of 3$ + 5$ of service/tip..its just retarded...