They'd restored the theater marquee, unrenovated store fronts, and parked 60s and 70s cars on the streets. After being introduced to some cast and crew (James Franco--swoon) and watching an earlier documentary about Milk, hundreds of extras filled the intersection of Castro and 17th, where bright lights were shining down from the rooftops on every side. They lit some shots with piercing smokey flares, making it seem dramatic even before the music is added.
There was also a lot of standing around, but it was pretty interesting seeing the movie-making process first-hand. And I got to see Sean Penn in a couple shots.
I found myself standing right next to Emile Hirsch, and saw gay icons Cleve Jones and Gilbert Baker. At one point Carrie Fisher even showed up to promote her one-woman stage show. Overall, a pretty cool thing to be a part of.