Black Coffee
Just simple coffee, ground coffee beans steeped in hot water.
Espresso
Espresso shots are served by itself or used in other drinks, very strong.
Latte
Very popular choice, a latte has a shot of espresso and steamed milk with foam, and can be flavored with anything like vanilla.
Mocha
Mocha is a great choice as it has chocolate. expresso and steamed milk with foam.