To adapt it, you could start with a character from Glee having a dream or a vision of the Beauty and the Beast world. Let's say Santana has this vision. She then decides to bring it to the Glee club. They start to incorporate the story into their own lives and relationships. The characters could take on the personalities of the Beauty and the Beast characters in different ways. For example, Brittany could be the innocent and kind - hearted Belle, and Artie could be the Beast who is initially grumpy but has a heart of gold. They could then perform songs from the Beauty and the Beast musical within the Glee club, adding their own Glee - style choreography.
The adaptation could be done by making the Glee club members find a mysterious object that transports them into the Beauty and the Beast world. Once there, they have to figure out how to get back. In the process, they interact with the characters from the original story. The Glee kids could teach the Beauty and the Beast characters about modern music and performance styles. And in return, the Beauty and the Beast characters could teach them about loyalty and true love. The Glee club could then use this experience to create a new and exciting musical performance for their school, with elements of the Beauty and the Beast story woven throughout.