We're spending a night in Athens at the beginning of our Greece trip, and a night at the end. We'll be in Athens for less than 24 hours each time, but with enough time to at least enjoy a nice dinner and some walking around, so we are thinking about staying at a hotel in the city.

I have points that could be used at any of the following so am curious about recommendations from people who have been to each:

• Grande Bretagne
• King George
• Hilton Athens

Thanks!