The Cantina de San Angel is open lagoon side in Mexico. It was closed for quite awhile and a temporary stand was in its place. That temporary stand is closed now. I don't think there was any seating for the temporary stand. Maybe that is what the PP experienced.
The Cantina is in the same building as the new La Hacienda, which is a TS restaurant serving dinner starting at 4 PM. The Cantina is able to use the indoor seating of La Hacienda during the day, as well as its own outdoor seating area.
We have always enjoyed La Cantina and we will be returning on our next trip.