This is clever. The poster on the left apparently indicates the only artists that have any members that aren't dudes. Similar posters could be made using many other rock festival demographic rarities too, of course. Over the last coupla decades, I've noticed, commented on and tried in various ways to avoid/change the overwhelming #whitestraightdudeness of rock/indie/punk/hxc shows/scenes, and/or to at least help my little rocklife be less homogenous. Ideology aside, I've just learned that I have more fun and feel happier when I'm spending time with a more diverse group of people, whether that's at shows or parties or picnics or anything. I think we all do, even (and perhaps especially) when it brings a measure of initial/occasional discomfort. Anyway, here's to rockworld gettin a little more worldly.
ps - If it needs saying, as a vet of many dudebands, I give myself as hard a time about this kinda thing as I do anyone else. In a weird way, that's one of many reasons I think I've ended up a solo artist, cos then I can play music with more folks more freely, which has happened lots (and continues to more and more) in various situations and permutations.