Rhys Ifans and Sienna Miller. But where?

Paparrazi site Splash has a picture of Rhys Ifans and Seinna Miller arriving at their hotel in Mexico City. But which hotel is it?

We're all scratching our heads trying to identify it from the bushes outside but we've come up with zilch.

Half our kingdom (or a bottle of champagne) to anyone who can enlighten us.