The couvert isn't free, and the daily fish is the best order

The bread, olives, and cheese that land on your table when you sit down are the "couvert," and they're charged per item you touch; send back what you don't want and nobody minds. The "prato do dia" at lunch is the value meal. Grilled fish is sold by weight; ask the price. Coffee is an espresso ("um café"), and a pastel de nata is a breakfast, not a dessert. Tipping is a few coins or rounding up.