The author states that a tisch is a very exclusive idea. Some people are invited to sit around the table and some are not. However, a lesser known halakhah surrounds Jewish table culture -- one that moves
the "table" in a direction that is more open and provides more permeable boundaries. Jews are not permitted to carry an item from a private domain to a public domain on Shabbat. In order to facilitate a transfer of any object from a private to a public domain or vice versa, there must be a wall or a fake wall enclosing the public domain (and connecting it to the private domain). This fake wall is called an eruv, literally a mixing or a mixture, since it "mixes" public and private, converting public space to private space.