Just read an article about horchoffee -- horchata with a shot of espresso. Haven't tried it, but it seems like a pretty obvious combination, not particularly far removed from your average latte made with non-dairy creamer. But apparently, though it is becoming increasingly popular on both coasts, it has become hugely controversial. Accusations of appropriation are flying.
Of course, all view it as appropriating horchata, but why might it not be appropriating espresso? Espresso is Ethiopian by way of Italy. And horchata was adopted from Spain. And not one of the ingredients is indigenous to the Americas (cinnamon, rice, sugar).
I almost get the feeling that people simply want to fight.
That said, my reaction to this is, I hope someone in this area starts serving it. Sounds tasty. And sounds like the history of the world--if it tastes good, adopt it.