Rick, I think your saying what many are thinking, in a nice way is exactly what is needed. Those that complain are usually the ones that need the advice. As long as one does it in the beginning, and in a respectful way is what is important. There are so many variations on the theme of "sessions", that it only makes sense to set the tone in the beginning.

With regard to the issue of performance vs. participation, it is my humble opinion that anytime someone interprets a song, it is a performance. I am usually trying to convey my interpretation of the authors work. I am trying to make those around me feel a specific feeling. Blessings Barbara, Cap'n Bob and I swapped songs in a very informal gathering last summer. But we just used common sense, and the songs were very interpretive. There is a world of difference in how I would sing a song, as well as what I would choose, in a sing along at a campfire as opposed to a session.

Big Mick