Note two things especially: in the late 2nd C. the Christians already call the table an "altar", and they take special care of the elements. This is from HERE.
Tertullian [ca. 200/206 AD] in his treaties on Prayer [6,2], quotes John 6 in connection with a spiritual understanding of the Lord's prayer "give us this day our daily bread." In a spiritual sense Christ is our daily Bread, presumably because of the practice of the daily reception of the Eucharist.
Later in that same treatise [19,1] he writes;
Likewise, regard to days of fast, many do not think they should be present at the sacrificial prayers, because their fast would be broken if they were to receive the Body of the Lord. Does the Eucharist, then, obviate a work devoted to God, or does it bind it more to god? Will not your fast be more solemn if, in addition, you have stood at God's altar? The body of the Lord having been received and reserved, each point is secured: both the participation in the sacrifice and the discharge of duty.
Regarding worship on the Lord's Day Tertullian also writes; [The Crown [3,4] AD 211]:
We take anxious care lest something of our Cup of Bread should fall upon the ground.
