Legal analysis: if it does not disturb the people is legal, but if it disturbs the people is not legal. Square dancing in a small area may cause inconvenience to the neighbors' lives, violating the civil rights and interests of other people in the neighboring relationship under the civil law; it may also violate the relevant provisions of the law of public order and management as well as the relevant provisions of the law of environmental protection due to the noise.
Legal basis: "Chinese People's *** and the Prevention and Control of Environmental Noise Pollution Law" Article 58 Violation of the provisions of this law, one of the following acts, the public security organs to give a warning, and may be fined: (a) the use of loud-hailer in urban areas in the concentration of noise-sensitive buildings in the area; (b) violation of the provisions of the local public security organs in the urban areas of the streets, squares, parks and other public *** place to organize entertainment, gatherings and so on. ** place to organize entertainment, assembly and other activities, the use of sound equipment, produce interference with the surrounding living environment of excessive volume; (3) not in accordance with the provisions of Article 46 and Article 47 of this Law to take measures to send from the family indoors to seriously interfere with the lives of the surrounding residents of the environmental noise.