If it's any consolation; everyone I asked said Dead Rabbits, and Blackmarket Syndicate both put on a great show.
American Heist put on the best performance I've seen from them. They got the crowd really fired up, and quite a few joined in singing, which their songs are so perfectly made for. They put on a great show, that was fun even if you're not a punk.
Krum Bums rocked Walter's like few(if anyone else) have. The crowd was rabid as soon as "Intro" began, and then vocalist Dave Tejas made the stage through the large audience. Dressed with a robber-like bandana he jumped on stage lifted the microphone stand as high as possible, like a war declaration, before tossing it out onto the floor. From then on the chaos was unleashed in a non-stop, mosh pit filled fashion. When Dave wasn't letting people sing in the mic he was shoving them off into the pit like a general commanding his army. From there on things that stand out besides the blistering fast and tight performance, and the giant vortex of a pit, include: Dave biting through Beer cans, and subsequently spraying the crowd with it, their performance of 7 Seconds "Young Til I Die", where they invited the best crowd singer on stage for the last verse, and Dave crowd surfing over to the bar, then having everyone bring him back to the stage.
Just before beginning their set Bones announced that they were testing a set list out, and that they were playing their entire first album; Rather Be Hated Than Ignored! The crowd somewhat ironically did "go insane" at the news. They wasted no time in starting, and got things off with a bang! Every song was played with such fury, and passion that it managed to make the album pale in comparison; a nearly unimaginable feat! Everyone was especially mic hungry in all the excitement, so Bones spent most of his time right near the crowd giving an equal chance to show their dedication. A quick glance in any direction would show that everyone including the band was having a great time. Once they finally finished the album with "Clockwork Fuse", an encore was immediately demanded. After a short group talk they announced they would play a Big Boys cover("Fun, Fun, Fun"). The crowd, however, still demanded more, so they played the requested "Psycho". But once again the crowd wanted more. So, by this point some people were laughing at the hyper show-goers unending desire for more songs. LCB finally decided on one more song "Just Like Clockwork", and this time smartly added that "This is our last song". By the end everyone seemed have finally filled their desire for Lower Class Brats