The math teacher and the disco ball

Mr. D is in major de-clutter mode and is trying to figure out if he should keep or get rid of a variety of items he's bought for the classroom over the years but never used, including a disco ball:

... This is the sort of novelty lighting you buy at Spencer's in the mall. I've always had this vision of roller-skating around the classroom with disco ball going, and what a memorable moment that would be, but I haven't been able to come up with any legitimate reason for doing so. ...

Can you?