How much of a difference does it make where you sit during a meeting. 

In our own team meetings we all tend to sit in the same seats each week, we have tried to mix it up a bit and move about but this didn't last long and we reverted back to our usual seats the following week. 

I like the idea of helping to diffuse some potentially difficult discussions by using round tables rather than have someone at the head of the table. 

An interesting perspective from Deloitte here.