in spain, a black coffee - a coffee without toppings (milk or worst) - is called "café solo".
in spanish (but also in italian), solo means alone.
sometimes it's easier to order two coffees even if you're waiting for someone that won't come.
i'm feeling mighty lonesome
haven't slept a wink
i walk the floor and watch the door
and in between i drink black coffee
love's a hand me down brew
i'll never know a sunday in this weekday room
(sarah vaughan, black coffee)