I once worked for a company which was already established in many markets, no tips allowed and fair pay. When the company entered the US market we got asked abo

I once worked for a company which was already established in many markets, no tips allowed and fair pay. When the company entered the US market we got asked about tipping left and right. Workers seem to like the gamble on getting a huge tip and for certain industries customers just assume that workers aren't well paid. But do you tip at Mc'Donalds, the gas station or the supermarket?