I stood and knocked for about half an hour in the middle of the night, and I rang the bell repeatedly. Whether the lock on the door was messed up or someone had bolted it inside, the hotel needs to take immediate action to ensure this does not happen again. I knew how to open this door from my previous nights at Posado Don Mario, when I entered it without any problem, and I could also feel that the door had been locked from the inside.
Several people in the street came to try to help and use the key, all of them informed me it was not working because the door seemed locked from the inside. I did so easily, and without issue, every night of my stay until the final stay, when I returned home from a friend's house and was not able to enter the hotel through the side door with my key, as I had on previous nights. I stayed several nights at Posado Don Mario, and because the hotel isn't staffed during the night (which I completely understand!) each guest is provided a key to enter through a side door at night. Oaxaca City is a truly incredible place, and the one drawback to my stay was the experience here. While this hotel was a great location, I had a scary and ultimately extremely disappointing experience with this hotel. Hotels near ITESM Instituto Tecnologico y de Estudios Superiores de MonterreySede Oaxaca.Hotels near Universidad Pedagogica Nacional Upn Santa Cruz Xoxocotlan.Hotels near URSE Universidad Regional de Sureste Campus Oaxaca de Juarez.Hotels near Universidad Regional del sureste.Hotels near Universidad Autonoma Benito Juarez de Oaxaca.