Recently we went out to eat with a big group of friends. As usual, one person paid with their credit card and everyone else gave them cash for their portion of the bill. The friend who paid with the credit card didn’t bother to read the itemized bill, and kept quiet when our cash didn’t cover the bill. Fortunately, another of our friends did read the itemized bill, and discovered that we had been charged for some other table’s drinks (plus our own). He brought it to the attention of the waitress, who corrected the charge. Our poor friend almost paid a fortune in over-charges just because he didn’t check the bill (and was too polite to ask us for the extra cash).
It’s always a good idea to check your bill, especially in a large group where it would be easy to overlook extra charges.