"The beers are open."
Translation:Øllene er åbne.
Because it is plural.
In the singular, it would be: "Øllen er åben" (The beer is open)
So the form "åbent" would be used with a t-word, while "Øl" is a n-word, which enforces "åben", is that right?
Then you are saying that the beers are opening (or beers open...).--Question: what are the beers opening? A wine? The door? ;-)