Round tables. The only time anyone is really right next to me is when my husband and I feel like sitting together. Then it's really rude because we are intentionally in each others space and use that to our advantage.
My dinner table is also set up with the chairs directly across and we really never have more than 4 people at one sitting.
I still want the answer, mind you. I will not be distracted with more questions when I want a good answer.