If you ever visit Hanoi or Ho Chi Minh City, be sure to visit a park at sunrise. It will be full of people exercising. In addition to the walkers, joggers and bikers, people are ballroom dancing, playing badmitton, doing aerobics, and Qi Gong. You might see them singing opera or roller skating or riding skateboards.
After bit some play board games or sit and talk. Then everyone hurries off to work or home.