The Pods or seating area's in a couple of those photos were one flight down from the "main entrance" floor. There were several restaurants on that floor that served in those pods. I'm not sure what exterior layered structures you are talking about.
I found this video and was curious as to what building was bulldozed to build the RenCen.
https://www.youtube.com/watch?v=zU0NPAhlXMI
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