An incident about "Do ghosts like music or what?"

When I used to go to music sessions at a friend's house, just after she had moved in to that house I "noticed" one evening that there was an old couple sitting in the next room looking through the large opening into the back room where we were playing music. At first they seemed puzzled about why people were playing music in their home, but after a short time they just settled back and started enjoying themselves. They left after an hour or so. I don't see people as if they are there, but in my mind's eye, almost like a visual memory.

Helen