At around 5:15 p.m., as I was leaving the Marriott where CPAC is being held, I ran into a few of the Occupy hippies doing a "mike check" and going over to another side of the hotel.
This video was around the Metro stop. I didn't see any of the union astroturf who were out earlier in the day. The unions were scheduled to come back at 5 p.m. and protest some more.
Apparently, things heated up, and these hippies converged with another group who tried to enter the hotel, but were stopped by the police (video from Breitbart TV).