Lyric discussion by repowers 

Cover art for Sweet Spots lyrics by Fiery Furnaces, The

References a lot of places on the west side of Chicago. The Lake Street El (the Green Line) heads straight west out of downtown. Cicero is a major north-south street a ways west. Harlem is another, further west still. Brach's used to have a massive candy manufacturing plant along the Green Line.

Sounds like the protagonist sneaks into the candy plant to steal some freebies!