Dancing is certainly a good way to get exercise, and these women, (some men too), were sweating up a storm to Zumba. I had arisen at 5 am to see my wife off to the airport and then wandered down to Hoan Kiem Lake in Hanoi. What a scene. These people went from about 5 to 6:30 am either before work or before the heat would make it impossible to do this much exercise outdoors. At the bottom is Hoan Kiem Lake taken in the evening with what look like lamps of some kind in the branches. I used a Photoshop plug-in called Topaz Adjust and the Spicify filter to give a faux HDR effect. My wife hates it!