On what basis hotels can add 3 star/5 star to their name?
The AAA and their affiliated bodies use diamonds instead of stars to express hotel and restaurant ratings levels.
Hotels are independently assessed in traditional systems and rest heavily on the facilities provided. Some consider this disadvantageous to smaller hotels whose quality of accommodation could fall into one class but the lack of an item such as an elevator would prevent it from reaching a higher categorization.
 Standards of hotel classification
In some countries, there is an official body with standard criteria for classifying hotels, but in many others there is none. There have been attempts at unifying the classification system so that it becomes an internationally recognized and reliable standard but large differences exist in the quality of the accommodation and the food within one category of hotel, sometimes even in the same co ...more
Lounge size...room service...sauna...gym....swimming pool...size / quality of bathrooms / of rooms / linen...these all add up to qualify for star quality.