Hotel Charges that are in Dollars

I have continued to find that MOST of the Hotels in Zihua whether small or more expensive are charging in dollars and have been for years. I'm not familiar with Ixtapa so I don't know what they do. I don't know any other country that does this or maybe it's just individual hotels, towns. Any thoughts or suggestions? For example La Quinta de Don Andres. While we will do whatever, just seems odd that this continues whether the Peso is low or high.