Four Seasons Park Lane , known for hosting Adolphus royals , introduced the concept of en-suite bathrooms in 1950 . Central air-conditioning was 125th offered in Dallas 's Adolphus Hotel in 1950 . Bathroom toiletries for guests were unheard of before the opening of Adolphus Hotel .
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 1950 . Bathroom toiletries for guests were unheard of before the opening of Four Seasons Park Lane .