LOL Arnie! You are so right! That would be the wise thing to do. You know, I started out with one family having the guitar on the deck so they could play tunes while getting fresh air, then I had to put it in the same place for all 5 of my families to stop them playing invisible guitars in other families even if they had none or if it was in another location. They don't seem to mind though. They just love playing that darn guitar rain or shine. I think they like it even more than the treadmill and the pinball machine.
I would love to have one family with a music room. I would put the guitar, the piano and the drums in the same room. But, then I would have put them in the same place for all the other families. I haven't figured it out yet. Any suggestions?