I just graduated college, so I'm in my very early twenties.
When I went to the first of my friends' weddings, one or two years ago, they announced the start of the dance, and no-one participated for the first two or three songs. I was kind of disappointed, because I was looking forward to dancing the night away. Luckily, some of my friends from swing dancing night were there and we helped get people comfortable on the floor. At one point we even organized a line dance! But at first, it was like pulling teeth.
The next wedding I went to didn't have a dance at all.
I guess I'm just sad at the perceived loss of culture I never got to experience, which is a negative emotion, correct.