The next sentence: Una mesa para dos, por favor.
You took the underground to the restaurant at night (una – the German “U-Bahn nachts” means “underground at night”). As you walk in, you point to a table already laid with knives and salt – sharp knives, if you pronounce them with a sharp S (mesa – the German “Messer” means “knife”). On the tablecloth there is a picture of a paraglider holding a tin with two snakes inside (para dos – the German “Dose” means “tin”, and the snakes stand for the S). Then you walk in through the gate (por favor).