I just came from a concert done by a band barely seen in the US which has an amazing show.
I've seen them twice now, last one (may 4th, in Chicago), there were two ejections BEFORE the DJ even started. Epic show though(I was three feet from the "small stage" and have some great pics of Richard and Flake), except for the two late 50s concertgoers that were ahead of me, they were doing some form of "interpretative dance" that I would call "flailing around like epileptic monkeys on meth", until the female of the pair stepped on my foot....which resulted in my spouse grabbing and restraining me so all I could do was the "I will end you" glare, which appeared to properly terrify* them into quietly enjoying the show without disturbing anyone else's enjoyment further(they kept knocking into people who were getting pissed but did nothing.
*seriously, when she saw me, she was backing away slowly with her hand over her mouth in sheer horror. I'm all of 5'5" and 150# of muscle, wearing silver doc martin's, jeans, and a bright pink jacket, and one of the concert hats, spouse is 6'2" 130# and 100% german(he could easily be Flake's twin).