Final answer:
The family and Mr. Pirzada do not eat at the dining table due to meals not being eaten in a civilized manner during the narrator's childhood.
Step-by-step explanation:
The important reason why the family and Mr. Pirzada do not eat at the dining table is because meals were not eaten in a civilized manner during the narrator's childhood. The family did not sit down together and bless the meal as a family. Instead, meals were obtained haphazardly, with different family members eating in different ways, such as from the skillet, pot, tin plates, or even using their hands. However, it is important to note that this reason is specific to the narrator's family and does not apply to all families.