It is quite common for legislative bodies to sit in "semi circles".
I can see how, for historical reasons, this shape was optimal for hearing clearly in a large room, however this needs not be so in the present day and age.
This "strip-like" configuration arguably also lead to the concept of left and right and of two political "poles".
Why, then, do we keep on using this seating structure? Are there any countries that experimented with different seating shapes and with what results?