This is hard to stop unless you provide a better venue nearby. The only way to stop them is to negotiate for a longer period of time and turn down the volume.
You can't go into a fight with the square dancers because they are old and basically say they have a heart condition. If you don't know that it's a real heart condition and you go to them to argue about it, it might cause them to have an attack.
So look for the community to complain, or else call the police, let them manage, otherwise you personally is very difficult to do, if you do not let her dance, it will only be counterproductive, and if you have a tough attitude they will also fall down, or get angry and lie on the ground and other behaviors, do not directly say that she knows you do not want her to dance, she will only aggravate the situation so the community will play a big role at this time.
In the social life of the noise of public concern "square dance noise" has made relevant provisions. According to the "draft" article 59 and 77, in the public *** place to carry out entertainment, fitness and other activities, should comply with the public *** place managers about the activities of the area and time and so on, to take effective measures to control the noise, to avoid interference with the surrounding living environment;
Use of audio equipment, shall not interfere with the surrounding living environment, produce excessive volume, should comply with the relevant provisions of the local public security organs. . Failure to comply with the above provisions, do not listen to the relevant units of discouragement, mediation, will be law enforcement departments or law enforcement agencies will be warned and ordered to correct; refused to correct, a fine of two hundred yuan or more than five hundred yuan.