How to refer to the piece of furniture that bars use to store their drinks?
Solution 1:
I believe that's called the back bar, a generic term referring to the hutch, cabinets, shelves, etc., behind where the bartender stands.
Here's a screen shot from a store that sells bar furniture:
Note: Example used for illustrative purposes only. I am not trying to promote the website.
Solution 2:
Use "shelves". That's the word that would come naturally to me.
Solution 3:
I thought that was called a bar. When you see an "antique bar" sold, it is often the piece that houses the liquor, not the counter where the patrons sit.