We’ve all had to endure bad waiters, but how many of us have been so dissatisfied with our service that we left no gratuity at all?

And while this is a largely American problem, as tipping is practically unheard of in many other parts of the world, it’s still something to consider. It isn’t exactly fair that restaurants pass the cost of paying servers a fair wage onto their customers, but is the solution to abstain from the practice altogether? Then there’s the question of calculating percentages (either in your head or on your phone) to determine the optimal tip — which, depending on how you answer this one, may be no tip at all.