promenade concert 
noun British
A concert of classical music at which a part of the audience stands in an area without seating, for which tickets are sold at a reduced price. The most famous series of such concerts is the annual BBC Promenade Concerts (known as the Proms), instituted by Sir Henry Wood in 1895.At 10, she played at the World Harp Congress in Paris, and at 11 she became the youngest member of the National Youth Orchestra of Great Britain to perform in a BBC promenade concert at Royal Albert Hall....
- Heathrow Air traffic controllers altered the approach run to coincide with the beginning of a promenade concert at Chiswick House.
- These were copied from the promenade concerts and waltz nights of Johann Strauss, who was performing three times a night in Vienna by 1830 and then toured Europe.