Look at the windows though. Haven't been cleaned in a long time.

I agree with you, this looks like a place that gets used. Not abandoned at all to fit with the modern twisted definition and not at all with the original definition of an "in between" place like a hallway or foyer.

If the only criteria is "no people" then I've got a thousand post-construction, pre-use photos I could post. But an empty conference room or theater isn't liminal