WELL, by the time we got there, security had closed off the lawn because there were too many people.
SO, we ended up sneaking around a fence to get into the garden behind the lawn and it was one of those very happy accidents. It was beautiful back there and instead of feeling like sardines in a can like everyone else, we could spread out and enjoy the music. I'm sure it would have been better to actually get into the lawn and hang out with our friends but it turned out alright.
From this angle, it looks like were just hanging out in some mansion's backyard not in downtown Chicago.