Thing is they usually have a member of friends(PTA) do the disco. Equipment consists of cd decks (last disco only one side worked), mixer, amp, all sat in an old kitchen cabinet and 2 speakers on stands(all equipment owned by the school) no frontage.
Music is usually played from the current Now series, and alot of songs played 3 times. At most they use 3 cds!
No interaction with the kids, so the boys usually slide on their knees etc.
The Head will stop the music if she sees one piece of litter on the floor.
A couple of weeks ago, I did a school disco for kids aged 4-11 years (lovely little school, the Head was great)
I did party dances with the kids and they all said thanks at the end.
I suppose, some you win, some you lose!