These are some photos from Moon Bar on the rooftop of the Banyan Tree hotel in Bangkok. The effect with the lights is a simple technique that i learned from Cybele who learned it from Andrew G while shooting a party at Harry M Miller’s penthouse.
Using flash, simply set your shutter speed to about half a second and take your photo while spinning the camera in a circular fashion. Check my settings here.
You need to be in a location where there is lots of speckled light behind the subject, such as a rooftop at night with the city in the background.
This is what it looked like with the camera held still.