Legal analysis: case by case. Because square dancing if the noise is too high is an illegal behavior, but if there is no great noise will not disturb the people, not illegal.
Legal basis: "Chinese people's *** and the prevention and control of environmental noise pollution law"
Article 2 The environmental noise referred to in this law, refers to the industrial production, building construction, transportation and social life in the production of sound interference with the surrounding living environment. The environmental noise pollution referred to in this Law refers to the phenomenon in which the environmental noise generated exceeds the environmental noise emission standards set by the state and interferes with the normal life, work and study of others.
Article 3 This Law applies to the prevention and control of environmental noise pollution in the domain of the Chinese People's **** and State. Prevention and control of noise hazards as a result of engaging in their own production and business work shall not be subject to this Law.