The answer is both. I have a special say in this question because my mother is a member of the square dance army. In the evening, she went to a place with audio equipment, rain or shine, and took some dancing tools, such as fans and drums, to cheer up all night.
Why are aunts interested? Because the average age of China square dance aunts is mostly around 50 years old, and even 60 years old is very common, their spare time life is actually very boring. When I came back from work during the day, you said that she could only do housework before the square dance, and then she could only stand there in a daze. Because their generation doesn't play mobile phones and computers very much, saying that it hurts their eyes and is unhealthy, they have always advocated going out for a walk.
They also have the idea of taking it as exercise. Like my mother, because her digestion ability is not very good, she always goes out for a walk after dinner. It takes a long time to digest food. Walking alone is boring. When square dance is popular, she will join in to help digestion instead of walking, which is better than walking.
Another reason is that women, after all, also pursue beauty and want to be elegant at any age. Everyone knows that the wrinkles on his face are very helpless, but his figure is still under control. Therefore, the prevalence of square dance is not unreasonable.