You know how modern electronic tills in trendy places display this message that goes 'Your server is' followed by the name of the person serving you? You find them in all the trendy bars in London. So you can call the person by name and be friendly if you so desire. Well, if you go to Gatwick airport North terminal, there is a juice and bagel bar called Pip. The juices and smoothies are great! And the person who programmed the till has a sense of humour: it says 'Your server is CRAZY'.