1, you can complain to the relevant departments, ask them to negotiate, because dancing square dance if the noise is too high is a kind of illegal behavior, you can ask the relevant departments to manage, in fact, the city management is responsible for the management of this thing.
2, you can also reflect to the neighborhood committee, so that the neighborhood committee and square dancing people to negotiate, reduce the decibel, try not to dance in the people rest time square dance.
3, you can also negotiate with the square dancers on their own, some of them are still good at talking, you can tell them that the sound is too loud, please ask them to reduce the noise.