The day starts with a café solo, a small cup of very strong and concentrated black coffee accompanied by a piece of pastry. In colder regions and for early morning workers, the black coffee is frequently flavored with a dash of cognac. That's referred to as "carajillo", carajo being a Spanish slang word for penis. Presumably, starting your day with a shot of strong alcohol and caffeine gives you strength.
Coffee is consumed throughout the day and particularly to finish off a meal. Depending on the amount of milk added, the drink has different names. Café con leche is served in a bigger cup with hot milk added: until the customer shouts: stop! Café nube has just a dash of hot or cold milk, enough to develop a "cloud" in the black liquid. And "lagrima" describes an even smaller amount of milk, just a tear drop to give the coffee color and to soften the strong, bitter taste.