Saturday fun activity: Where IS this?

     Of course I'm trying to stump you.
     And at first glance this very bare room seems difficult to place.
     Which is why I like it, for contest purposes.
     Yet at the same time.
     It so plainly manifests itself.
     That I imagine somebody will know exactly where in Chicago this study in bare brown ugliness is located.
     Where is this empty place, like a stage set from Beckett?
     The prize is one of my hard-to-get-ahold-of 2015 blog posters.
     Delivered in a custom-made cardboard tube.
     From my good friends at Chicago Mailing Tube.
     So take a good look at this antechamber from a Kafka story. 
     And no, the red streak isn't blood.
     At least I don't think it was blood.
     Although I tried not to look too closely.
     Remember to place your guesses below.
     Good luck. Have fun.