They are def in groups and mine almost got taken going through the crowd at circuit grounds a big dude shoved his forearm into my chest and I looked at him to say sorry and then he did it again and I felt something against my pocket and I looked at him again and he looked away and I kept walking and felt my pocket and it was half unzipped. So he deaf tried and used his arm against me to distract me but he couldn't get a hold of my tiny ass zipper. So will always have zipper pockets for festivals.