I'm guessing this is the correct Concert Hall.
Concert Hall
The Paul Hamlyn Hall is a large iron and glass structure adjacent to, and with direct access to, the main opera house building [Royal Opera House or Covent Garden]. The hall now acts as the atrium and main public area of the opera house, with a champagne bar, restaurant and other hospitality services, and also providing access to the main auditorium at all levels.
The site where KeyBank and the Butler is located previously was the home of the Pow building, the first location for the First National Bank and the location of Concert Hall on the third floor where Mark Twain once appeared.
Queen’s Concert Rooms, Hanover Square,
The Hanover Square Rooms or the Queen's Concert Rooms were assembly rooms established, principally for musical performances, on the corner of Hanover Square, London, by Sir John Gallini in partnership with Johann Christian Bach and Carl Friedrich Abel&nbs
The Royal Albert Hall is a concert hall on the northern edge of South Kensington, London.