There were mail sorting machines in the TV room, though they were not nearly as long, and ran silently. It had only a couple dozen bins, and despite having no visible intake, envelopes still filled up the slots.
I worked for a while, and the bins kept threatening to overflow, but never did jam; after a bit, the machine kept running but no more envelopes came out, and I settled down on the rightmost seat on the couch.
Two more people came out and settled on the couch, and they decided to lay down. The one in the middle leaned against my legs, and the one on the right against the person in the middle.