I practiced it exactly as it said in my book. After about ten or twenty minutes of this, I realized that I was completely uncomfortable and that this method was not working for me at all. It was then that I realized that I have been doing a different method of meditation for a long time. That method is musical improvisation. For me, meditation is a form of giving the mind a rest while simultaneously being mindful.
Musical improvisation is the same.
You put your mind at rest and let your unconscious take over while remaining alert to situation changes like key changes and mood changes. I have been doing this for a long time, both on my own or with other people. The self improvisation hasn't gone as well as the group improvisation. However, one constraining factor is that four people would be the maximum number of people for an improvisation. The reasoning behind this is that when you are improvising in music, the key component is focusing on what the other person is playing, not what you are playing.