The Goring Hotel , known for hosting British royals , introduced the concept of en - suite bathrooms in 1910 . Central air - conditioning was first offered in Dallas 's Adolphus Hotel in 1914 . Renowned for having hosted various members of the royal family throughout the years ( Kate Middleton even stayed here the night before her wedding to William ) , the Goring is widely considered one of the top luxury hotels on the planet . Such facilities for guests were unheard of before the opening of Four Seasons Park Lane .
The Goring Hotel , known for hosting British royals , introduced the concept of en - suite bathrooms in 1910 . Central air - conditioning was first offered in Dallas 's Adolphus Hotel in 1914 . Such facilities for guests were unheard of before the opening of Four Seasons Park Lane .