I came across a YouTube video recently in which a young guy from England talks about the $20 trick. He said if you slip the front desk agent a $20 bill at check in, there is a great possibility you will be upgraded to a much nicer room. No shit, in my day this was called tipping. And yes, it works. Are you more inclined to do something for somebody who gives you money over someone who doesn't? Of course; and money is the great equalizer.
Tipping is a lost art, and it will get you better service. The idea that they had to change the word to trick proves that no one tips anymore, or very few people. I work in a limited service hotel, and only about five percent of the times that I bring an item to a room do they give a dime.
It's the idea that they give nothing that is infuriating. Give something, give a penny; take a penny from me. If you take a penny from me at least I know the ledger is moving in a direction. That way I will think that if I work harder, I can reverse the course of this action. Zero is the worst, it doesn't move in any direction. It defies the laws of physics. The Earth is spinning, the Universe is expanding, but your wallet doesn't move.