I still don't see the draw of using coffeescript server side. Why bother using the language (javascript on node.js) if you are just gonna turn it into something

I still don't see the draw of using coffeescript server side. Why bother using the language (javascript on node.js) if you are just gonna turn it into something else? Wouldn't ruby suit your needs better? To some degree I kinda feel like many shops are doing it just so they can say they use node. Maybe that isn't the case.