I have to post this up... just released.
I went to this wicked party at the festival last week. It was called "Silent Disco", sponsored by like Kokanee and Skullcandy.
They had 3 DJ's, and each were playing on a different channel. When you got in, you got an FM transciever and a pair of Skullcandy headphones. You then picked a channel, due to the fact that there were no speakers in the main room.
So there was zero music playing, and you chose your vibe. I absolutely loved it... Halfway through the vid is shots from the party. You can see everyone was partying their brains out, but I was chilling in the corner talking to my buddies listening to groovy funk music.