Carolyn Osiek and David L. Balch told us in "Families in the New Testament World - Households and House Churches" that while the attendants stood ready for their ministry and there was silence, the president gave an exposition of Holy Scriptures, and then rose and sang a hymn to God, a new or an old one. All the others made their turn, listening in silence except for the closing refrains, when all, men and women, lifted up their voices.
After the hymns, the young men brought in portable tables with bread, salt and water, although some might laugh, there is neither wine nor meat. While most ate leavened bread seasoned with salt mixed with hyssop, the simplest and purest food was reserved for their superiors, unleavened bread with salt unmixed. After supper there was an all night vigil. What elements of this New Testament worship have come down to us today?