That's one thing I'll mention about coffee - I can usually make do with a lot of things: overcook my egg, undercook my egg, I can deal with it and eat it. Same with a steak, or bacon, or if the vinaigrette is a little too sharp or too sweet, I can make do.
Give me a cup of coffee with sugar in it? That'll get spit right back into the cup, the cup emptied in the nearest appropriate place, and I'll feel the need to brush my teeth twice to get the taste out. There's something about sugar and coffee that just assaults my tastebuds.
White coffee...that's not uncommon here, but I think it's seen as a more old-fashioned term, especially since the rise of coffee culture the last 25 years or so. "Light coffee" is synonymous with that. I still see that on coffee vending machines (when I can find one of those relics - highway rest stops and hospitals, mainly). My mom will still ask, "Do you want any lightener?" when pouring a cup of coffee.
When we lived in the UK, I'd occasionally be asked if I wanted my tea white, meaning with milk. I remember the first time that happened, neither MrsT nor I knew exactly what the woman offering us tea meant.
And yes, we can still get sugar cubes here, but only in white sugar. I like the brown stuff, like turbinado sugar or Demerara sugar. I can't find that in cubes very easily.