On the right there is a lowboard or something drawn in, so 50cm are already missing.
Each chair at the head end with a person on it needs about 70cm, so 1.4m gone, if you want to walk past you need at least another 50cm of space. It’s going to be tight with the 3m table.
:-) sorry but when I think about the m2 number, I imagine a 10-12 person table in my head.