In a Spanish cafe, ordering a coffee is a breeze. To clarify, when asking for a cup of coffee in Spanish, you can use the word 'taza' which refers to a cup or mug. This is a common term used in cafes and restaurants throughout Spain. For example, you could say 'Un café, por favor' (a coffee, please) or 'Un vaso de café, por favor' (a cup of coffee, please). The key is to use the word 'taza' if you mean a traditional ceramic cup or 'vaso' if you're referring to a larger container. Don't worry if you make a mistake, locals will appreciate your effort to speak Spanish and correct you politely.