I'd always been afraid to try espresso, but when I saw an eighty year old Spanish woman drinking her 8 o'clock shot in a Madrid train station I knew it was time to start. Some restaurants in Europe serve espresso when you ask for cafe or coffee.

It's not much liquid--a typical serving really is the equivalent of a shot of whiskey. The drinking, in slow sips, should still take time. Drink it with a glass of water.

It's bitter: people who drink their coffee black tend to like it, as do people who enjoy bitter stout beer. After you start you'll have a hard time going back to the watered down taste of plain coffee.