Must be a House of Blues thing. Security at House of Blues Chicago are a bunch of douchebags, they've seemed to lighten up though in the last few years. Back when I first started going there they wouldn't allow sitting, which was ridiculous considering I was there for Summer Slaughter, an all day thing.
9/4 Cult of Lune
9/11-13 Riot Fest
9/19 Uncle Acid & the Deadbeats
9/25 Cattle Decapitation
9/26 D.R.I. and/or Alcest