Sergei Mamontov and Pavel Spiro at the piano Vasily Polenov (1844-1927)

The picture has something of this: people, two, wear, man, group, woman, three, child, sit, military, furniture, soldier, four, seat, music, transportation system.
Perhaps it’s a painting of a man sitting at a piano next to a man standing in front of a piano in a room with a mirror on the wall.