So just happened across this scene tonight. Someone was playing classical dance music, and maybe about 18 couples were slow dancing to it, in the middle of Columbus Circle (if you watch CNN, you can often see it behind the anchors). I don't know how it got organized initially, but people would be joining the dance, and others would leave, so it seemed a fairly organic sort of thing.
Just something I found rather cool.
The fountains surrounding the Columbus Circle plaza
Some people dancing:
And finally a woman on a cellphone with the fountains in the background
These photos in slightly larger size are also at my Flickr.
... night candids are fun ^_^