When I first learned Ruby, I used it everywhere. Not because I was that excited about it, but it was so much easier to do things with Ruby than any other language I knew at the time. (PHP and C.)
I think everybody has a favorite tool they use when they need to do some simple task. For some it's good old UNIX utilities, for some it's Ruby or Python, and for some it's Automator.
In our school, once you decide on schedule, you have to sign up for time slots, and you have to do it quickly. (Because others will take your slots.) It always crashes our servers, so I built an Express app that checks status and displays an appropriate GIF. (Up or down.)
Now I'm about to write a script that will check the system over and over again, and warn be when there are new time units available. Node.js happens to be perfect for this.