If anyone is looking for a last-minute getaway, I received an email last night that the beautiful (and apparently just renovated) La Casa Que Canta in Zihuatanejo, Mexico is offering every third night free for the rest of September.
See my review
here -- no idea why the review platform decided that my conclusion was "Not Recommended", but that is certainly not the case.
The timeline makes it of limited use, but an excellent deal on a very special property.