The fact can't be denied that in
1 Cor. 11 we know the Gentile church in Corinth participated often enough in what Paul called communion, for there to be problems.
Paul mentions communion/the Lord's Supper in two different passages in 1 Corinthians...
1 Cor. 10:16 The cup of blessing which we bless, is it not the communion of the blood of Christ? the bread which we break, is it not the communion of the body of Christ?
1 Cor. 10:17 For we being many are one bread, and one body and we are all partakers of that one bread.
So Paul here was teaching the Corinthians how the symbolism of the communion they participated in, was to remind them how they were part of the body of Christ.
And again Paul teaches in
1 Cor. 11 the importance of what he had just called communion and also referred to as the Lord's Supper... how necessary it was to the body of believers.
20 When ye come together therefore into one place, this is not to eat the Lord's supper.
21 For in eating every one taketh before other his own supper: and one is hungry, and another is drunken.
22 What? have ye not houses to eat and to drink in? or despise ye the church of God, and shame them that have not? What shall I say to you? shall I praise you in this? I praise you not.
23 For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread:
24 And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.
25 After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
26 For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.
27 Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord.
28 But let a man examine himself, and so let him eat of that bread, and drink of that cup.
29 For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.
30 For this cause many are weak and sickly among you, and many sleep.
31 For if we would judge ourselves, we should not be judged.
32 But when we are judged, we are chastened of the Lord, that we should not be condemned with the world.
33 Wherefore, my brethren, when ye come together to eat, tarry one for another.
34 And if any man hunger, let him eat at home; that ye come not together unto condemnation. And the rest will I set in order when I come.
Perhaps not having communion on a regular basis is part of what is wrong with the body of believers today?
1 Cor. 11:30 "For this cause many are weak and sickly among you, and many sleep."