Incorrect. Not everyone will complain to the manager. Many will just give a small or no tip or even write a bad review afterwards.
They were willing to pay for their meals but don't want to pay the mandatory tip due to poor service, so how are they being cheap?
Maybe, after they saw the sign stating that there was a mandatory gratuity for parties 5 or more, they should have got up and left?
No one forced them to eat there, and if there were issues with their meal, they should have taken it up with the waiter/waitress/manager during the meal. If something is wrong, tell them about it.
If, however, they ate all their food and stuck around for a while, I see no justification to their assertion that the service/food was bad.
People like this are exactly why this type of gratuity exists. Don't like it? Don't eat at places that include a gratuity.
A larger party is going to take more of a server's time. Instead of 20 tables of 2, they might only be able to handle 10 tables of two if there's a table of 10 people also in their coverage. Why should the server take it in the shorts when a cheap ass loser like the people in this story (and most of the people in this thread) decides that the 2 hours they spent and 50 changes they made to their orders weren't worth a tip to the server?
