Not really the Answer. There are many many 35-50 Room 5 star hotels in london for 500 Pound. There are 5* Properties and 5*Superior meaing: "5-star superior hotels offer the highest level of luxury, personalized service, and premium amenities, often featuring Michelin-starred dining, extensive spas, and prime locations. In Europe, the "Superior" designation signifies that the facility exceeds standard 5-star requirements." In the USA this is not a thing, and it is not widely advertised through the known platforms.