Going to Chicago

Overkill is at Synergy in W. Chicago, but it's the 17th. (They're in Cleveland on the 22nd according to their website.)

If your into the death/grind thing, Cephalic Carnage at the Fireside Bowl on the 22nd is probably your best bet.

There used to be a cool metal shop on Belmont called "The Alley", but the last time I was there it was all weirded out alternative crap. Haven't been there in a couple of years though, so I don't know what it's like now.