A few years ago, I was at a Bassnectar show and I maneuvered my way up behind a woman with dark hair down to her knees. At EDM concerts its usually packed shoulder to shoulder so personal boundaries go away in the crowd. In the crowd you usually vibe with the people around you and feed off their energy, I told her she had awesome hair and she said thanks and seemed to appreciate the comment but that was pretty much it, you couldnt hear each other anyways. I stayed at that spot behind her most of the concert and rubbed up against it a few times with my hands. She was with a dude that i assumed was her partner so I didn't talk to her other than that comment but it was great concert.