I had a similar experience at the Amara. I stayed in a club room. Beautiful room and view. Their rooftop infinity pool overlooking the city is also quite wonderful, especially early morning when you have it to yourself. Intimate breakfast in the lounge with city view and great food choices. I also had a Thai friend come and go as he pleased, unquestioned by staff, during the day. But I don’t know what the reaction, if any, would have been if he’d come up for the night. I will certainly be staying there again, hoping they don’t discriminate. But I’ve understood it’s unusual for this category of hotel to object to joiners, though some do.