Some restaurant etiquette is just common sense: Don't speak when your mouth is full, don't tell rude jokes during the meal, and always cover your mouth when you cough.
Others can be a bit more nuanced. Who pays after a business meal? Where do you put your napkin when you stand? And how exactly does one order the perfect bottle of wine?
We spoke with expert Patricia Napier-Fitzpatrick of The Etiquette School of New York. She not only makes a living teaching people the nuances of decorum, but has even written the book, "The Art of the Meal: Simple Etiquette for Simply Everyone."
She shared some guidelines for dining at expensive restaurants.
DO always dress nicely.
"I still believe men should wear jackets to dinner, if not a suit," Napier-Fitzpatrick said. "If a man is dining with clients — and especially clients from other countries which tend to be more formal — they should wear a jacket and a tie."
"Women should be wearing a dress or suit, and shoes instead of sandals."
DON'T put your cell phone, keys, or purse on the table.
It's just common sense. It distracts not only your other dining companions, but also your waiter and the entire restaurant.
DO let your guest order first.
"The host, especially if it's a woman, has to make it clear that he or she is the host," Napier-Fitzpatrick told us.
"Say phrases like, 'Will you please bring my guest...' or 'My guest would like to order first' to ward off confusion."
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