Is this really what middle schoolers are like nowadays? It’s been nearly 30 years since I was in middle school, but our dances were nothing like this. We had slow dancing, but far more sexualized were the fast dances where everyone sandwiched themselves boy/girl/boy/girl and grinded on each other. There was no mass separation of girls against one wall and boys on the other*, everyone too afraid to dance with the opposite sex. And definitely no one was running around like it was recess. It was a dance and, by and large, that’s what people did. Surely there were students who preferred socializing over dancing but, fortunately, everyone was free to participate (or not) in only the types of dancing they were comfortable with, which is a lot better than what’s going on in the OP scenario.
*Well, except for when the song
Work the Walls was played and everyone literally started humping the walls. Ah, DC in the early 90s...