Kudos to all hoteliers around the globe for surviving yet another day of dealing with these monsters. Writing for Hotel Management, Glenn Haussman said there are 4 types of guests people in the industry love to hate. Let's start with the Never Happy Complainer. "This person is pissed. But don’t worry, it’s not you. There is something seriously wrong with this individual’s life, and for some reason, it’s the hotel’s fault. You know the type: Something small goes wrong and no matter what you try to do, it’s never good enough."

A simple complaint "the water in the shower wasn’t hot enough" turns into a sad display where apologies are met with more anger. But they don't want a simple apology. They need more. Turns out, repeated apologies and asking how you can make the situation better are no good as well. "This person is hell-bent on poisoning your soul and making you feel as awful as they do."

Then there are the Party People. "At full-service hotels and casino resorts in particular, I see these folks ready to party. But not the type of partying that makes you money at the bar. Nope, these folks orchestrate their own party by bringing in massively sized coolers jam-packed with more beer and other forms of booze than anyone can possibly drink. With no shame or respect for the hotel, they’ll mount a mission more complex than Normandy to bring in drinking supplies so they can save a few bucks and not buy your alcohol. And, of course, they leave the guestroom festooned with their remnants of cocktailing gone bad."

What about the 20 People, 1 Room, No Problem? "Yes, they know the room has a single king-sized bed and a small chair in the corner. But that didn’t stop them from reserving a room for one or two people, and then stealthily sneaking in many, many more. It’s a giant pain as they overstuff the room and expect you not to notice; especially after they just asked you for a dozen extra pillows and blankets and a roll-away cot."

Let's not forget the I’ll Just Sit Here Person. Glenn said there are some who seem to be lost. Nobody knows if they're staying at the hotel or not. Nobody knows because they simply sit in the lobby for many, many hours. And they aren't working or anything. Just hanging out while waiting for something, or someone. However, nobody knows who that special someone or something is as everyone's shift is over before they move a muscle.