@Stoneycase that's Chicago for ya. Chicago folks love to chomp at shows, especially after that liquid courage is running through the system.
Every show in Chicago is chomper city. I move to the back last night and was no one talking back there. Was pretty surprised to be honest. The Tennessee and Colorado shows were had much less chomping going on. Saw Kikagaku in Maddison last year and could hear a pin drop on that place, next show I'm Chicago was just chomping.