Countable Coffee

You probably learned in high school, and from me as well, that drinks and other liquids are usually uncountable. Well, this isn't always true. The liquid itself is uncountable, but people still sometimes refer to that liquid in one of its most common containers as, for example, "a water". So:

"2 cokes" could mean 2 bottles of coke, 2 cans of coke, or maybe 2 glasses of coke at a restaurant.

"a coffee" could mean either one type of coffee, like "mocha is a popular coffee", or an order of coffee, or even a single serving of coffee in a jar or can.

Try to keep track when the drinks in the following paragraph are being referred to as (countable) servings or types, or (uncountable) liquids.

I went to my favorite bar the other day to get a beer, which I often do on Fridays after work. There's a beer there called Spaten that I really like. At this bar, as opposed to other bars, they really do give you a proper pint of beer when you ask for one. Some of the customers order cocktails instead of beer, too. I prefer beer.