There are The Park Room https://www.tripadvisor.com/Restaurant_Review-g186338-d1017662-Reviews-The_Park_Room-London_England.html, The drawing Room at brown's hotel https://www.tripadvisor.com/Hotel_Review-g186338-d188019-Reviews-Brown_s_Hotel-London_England.html or Hotel Cafe Royal https://www.tripadvisor.com/Hotel_Review-g186338-d586582-Reviews-Hotel_Cafe_Royal-London_England.html