I don't even notice all the little clocks. I actually like clocks a lot, and I check them a lot, but not the ones in these appliances. I usually don't notice when they run fast or when we go in or out of DLS.
But one can be a bit more specific and think of their long corridors as liminal spaces, but the cafés and stores in them as not. I flu a few times per year out of the same airport, and typically wait in the same café for over one hour. I use this time to rest a bit before getting on the flight and eat something, and it doesn't feel liminal at all.