It is pretty amazing that the new concert hall has reused the old ballroom as the seating area. The old balcony and ceiling are completely restored. I believe that you can actually sit at the balcony. In order to connect to the new performance stage, one wall of the ballroom was knocked down and a “portal” was created. This portal acts as a time gate separating the old and the new. By the way, the acoustic is stunning too.
50 oak street, san francisco