Waiting tables is one of the most challenging jobs out there. That's why it's always kind to give your servers some leeway. However, if they try to overcharge you and refuse to take it off the bill, you have grounds to complain.
One of the customers writes:
She and I were out for brunch and had a lovely time at an upscale rooftop restaurant in the heart of our city. Y'know, the kind with a full setting, cloth napkins, and white tablecloth. The kind where a pancake entrée has the word 'melange' and mimosas are $16. We had a great time even though the service was a little rushed.
We get it - Saturday brunch means a lot of tables with a speedy turnover. My sister had been a waitress throughout college; we even joked about her applying for the weekend shifts since she'd make great tips. When it came time to settle the check, we noticed we had been charged for two coffees, which we didn't order nor receive. While handing the bill back, I asked that they be taken off.