Always follow your common sense, cultural preferences and power position choices.
When you have a more informal meeting ensure you sit in the power position. This will allow your opinion and ideas to be appreciated.
Suggestion of Feng Shui layout for a Meeting Room
Ideally framed photos with glass panels would be displayed behind Finance and Personnel Directors so the Chair Person can see on an angle what is happening behind their back (entry).
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Feng Shui Steps 