Hacker News Reader

Traditionally, Cuba libre also has lime juice while a plain "rum and Coke" order leaves it out. https://iba-world.com/cuba-libre/

Wikipedia suggests only a few sources draw that distinction and including lime or lime juice in a "rum and Coke" is very normal.

I've had rum and coke with lime but I've never seen something without the lime referred to as Cuba Libre.

That said, I have never been to Cuba, so what do I know?