Here's the deal on Mar Rosa. They pay a fee to have the "right to" the area to the waterline, and always have. If the business is closed, they lose the right to pay for that strip. That strip of land is very valuable when it comes to selling the property. Consequently, the decision was made by the two owners, in May, 2014, that they were much better off staying open until the property was sold.
The way things go, it could be years. It could also be a week.
We are serious beach people, living on one, 4 months a year here, 8 months a year in California. Mar Rosa is where we choose to stay when we are in Mazatlan. It also has quality services and very helpful, knowledgeable staff.