Answer: The meaning is not in the silence, but in intention. When you eat with your friends on the spiritual path, you delve deeply into very strong inner intentions about how to strive together toward the goal, how to unite, to what even greater degree of connection you want to develop now, and then from that connection to the Creator.
Therefore, it is very important that people sit quietly absorbed in themselves.
Remark: Kabbalistic melodies are also often used at meals.
Answer: Yes, there are certain melodies, usually without words, that people sing together.
All these elements help them to come closer together internally in order to raise the common inner connection to the spiritual source—to the Creator.
From KabTV’s “Spiritual States” 7/9/21