Showed up to check-in around 11:55pm to be told that the manager canceled my room reservation and gave it away, which meant they had no vacancy and I had nowhere to go.
According to the front desk guy, the manager said that they tried calling me three times and attempted to charge my card, both of which have to be completely untrue because I had zero missed calls and no charge was made to my card.
I ended up sleeping on the couch of a friendly stranger who I met at a small bar after wandering around the neighborhood. I'm not even kidding. It turned out fine, but I will never book at a Motel 6 period out of fear they'll cancel my reservation and lie about it, leaving me nearly on the street. Absolutely appalling.