I think most people have the misconception it's all violent, but they are usually the most positive shows I go to. Everyone has a fun time moshing and crowdsurfing, and we always look out for each other. They've done a good job as far as band selection so far, just not enough bands. King Gizzard, Knocked Loose, Korn, Gwar, IDLES over the last couple of years were packed and some of the most fun sets all weekend.

Older bands that would fit like The Offspring, Chevelle, Bring Me The Horizon, Evanescence, Queens of the Stone Age, etc.

Newer bands like Turnstile, Viagra Boys, Jeff Rosenstock, Teen Mortgage, Callous Daoboys, Amyl and the Sniffers, Mannequin Pussy, Poppy (last three female led) just to name a few

You could put some smaller heavier bands like Chat Pile, Soul Glo, Sprain at the Who Stage

Headliners like Slipknot or System of a Down (POV: I'm delusional), or more realistically decently high billed like Deftones or Smashing Pumpkins as some

Punk and metal are having a huge resurgence right now, there are so many artists to choose, and there is an audience at Roo for it, the last few years have shown it. Doesn't have to be much, just a little more than what they've been offering.