I go to a monthly singaround in Surrey, where many of the singers and performers tend to bring material to perform which, in some way, reflects either the season or some particular occasion. The last one was on the Monday after Remembrance Sunday, and several of the songs were about the military or war/peace. One of the ladies present had brought her trumpet and we had a song or two - unaccompanied but for her trumpet - and then she played the "Last Post". Very moving and very appropriate.