Possible Clues:

• Financial professional recalled excellent places to view performances?
• Check old song picked up in music halls
• Recreational areas occupied by houses
• Examination round broadcast picked up in halls
• Duo - it performed in song for music halls
• Where public hearings take place?
• Where concertgoers sit out, I'd broken into song
• Eg, concert halls
• A mutiny to elevate atmosphere at the 28?
• Assembly rooms