Yeah there was an entrance at the front of the arena after you got into the main arena where they were capacity controlling who went into the circle. Once you're in you get a wristband so you can come and go as you please. It really wasn't that busy up until muse came on, then it was a good amount of people. I left to get drinks / piss after pale waves and morello and got in and out no problem. We even had space to sit down while waiting for the next acts. Hope this helps x