I get that people working in these establishments are not overly satisfied with their career choices but that leaves no excuse for rudeness. I witnessed a customer sit down and ask for a coffee. The server, William, told him that they stopped serving coffee at 10am. The gentleman asked for a water. After 5 minutes William asked if he wanted something to eat and he declined. William asked him to vacate his seat for a paying customer in a rather stern tone. The gentleman got up saying that he was about to order a drink but decided against it to which William responded by shouting an insult as he left. The customer returned, I assume to get his name, and the insulting tone continued as he left again. I also left the establishment at that point, favouring anther place in the airport. A rather interesting attitude to display in a place that looked like it needed customers.