A modern version of Dance Central is available for Meta Quest and Rift. You can download a free demo on the Meta Store to try it out.
While you can't officially download the full game for free on PC, here is how you can access it: dance-central-free-download-pc-game-full-version
You may find "Free Full Version" downloads on unofficial sites, but these are often and could contain malware. However, some fans have created community tools: A modern version of Dance Central is available
There is a community-driven repository on GitHub for a "Deluxe" version that modders use to enhance the original game. This typically requires original game files and is for advanced users. dance-central-free-download-pc-game-full-version