-
It works at the high-end Waldorf Astoria in Cabo & the Waldorf Maldives so likely it will work at the location you’re looking at.
I’ve used one of mine at Waldorf Astoria Chicago.
Which property are you looking at using for the certificate?
The relatively short exclusion list for FNCs is found here.
https://www.hilton.com/en/p/promotions/free-night-reward-property-exclusions/