Share 'How to observe workplace interactions (e.g. meetings) with minimal influence or effect on group?'

I posted this question over at LinkedIn Answers (link) yesterday. It's slightly outside the bounds of employee engagement, but I figure there are plenty of folks here who have great insight to share. Here's a bit more of the description I included with my question: I'm beginning to think more deeply about the role of observer in consulting relationships and how to minimize the degree to which a…