In most places around the world, governments close city parks when the sun sets. In Gia Định Park in the Phú Nhuận District of HCMC, the park is lit up at night and many citizens crowd the park to relax and take part in many activities, including dancing.
In some cases, organizations provide an audio loudspeaker system and play ballroom dance music at park pavilions. In other cases, individuals bring in their own sound systems and set up to provide dance instruction for a small fee. I am told they are set up in the park each night, but Saturday night is the big night.
The park can be reached from downtown by traveling north (one-way) on Đường Nguyễn Kiệm, then turn left at Đường Hoàng Minh Giám.