Ok the Agape feast was after the preaching and service was over, it's a fellowship meal. Problems surrounding it are discussed in both 1 Cor. 11 and James 2 and you need only read the passage in it's immediate context to see that clearly:
Therefore when you come together in one place, it is not to eat the Lord’s Supper. For in eating, each one takes his own supper ahead of others; and one is hungry and another is drunk. What! Do you not have houses to eat and drink in? Or do you despise the church of God and shame those who have nothing? What shall I say to you? Shall I praise you in this? I do not praise you. (1 Cor. 11:21-22)
That's how they were eating in an unworthy manner, they were depriving the poor in the love feasts. They were gorging themselves and getting drunk while the poor, most likely slaves, went home hungry. That is why some of them were sick and some of them slept. Check the context and while your at it you might want to take a look at James 2 because he is addressing the same thing.
But you have dishonored the poor man. Do not the rich oppress you and drag you into the courts? Do they not blaspheme that noble name by which you are called? If you really fulfill the royal law according to the Scripture, “You shall love your neighbor as yourself,” you do well; but if you show partiality, you commit sin, and are convicted by the law as transgressors. (James 2:6-8)
James would go on to ask is this even saving faith? The separation at final judgment, as sheep from goats comes to mind.
Grace and peace,
Mark