this gig in vegas was with a ton of metal bands of several subgenres , headlined by acts like hatebreed , devil driver , and otep ; it was the hardest grouping of bands they 'd ever played with , and all the guys in six foot tall were finding the process of adjusting from the tamer rock acts they usually played with to the darker , harder thrash , screamo , and death metal bands on this gig to be a strange but fun adventure .