17 Now in giving this next instruction I do not praise you, because you come together not for the better, but for the worse. 18 For, in the first place, when you come together as a ekklēsia, I hear that divisions exist among you; and in part I believe it. 19 For there also have to be factions among you, so that those who are approved may become evident among you. 20 Therefore when you come together it is not to eat the Lord’s Supper, 21 for when you eat, each one takes his own supper first; and one goes hungry while another gets drunk. 22 What! Do you not have houses in which to eat and drink? Or do you despise the ekklēsia of God and shame those who have nothing? What am I to say to you? Shall I praise you? In this I do not praise you.
33 So then, my brothers, when you come together to eat, wait for one another. 34 If anyone is hungry, have him eat at home, so that you do not come together for judgment. As to the remaining matters, I will give instructions when I come.
33 So then, my brothers, when you come together to eat, wait for one another. 34 If anyone is hungry, have him eat at home, so that you do not come together for judgment. As to the remaining matters, I will give instructions when I come.
v22 seems to imply that the Corinthians do not meet in houses. Paul is telling them to have their meals at home before they congregate to participate in the Lord's Supper, which is to be ceremonial, not an actual meal. It also indicates that when they have meals in their assembly, only those who pay can eat. Those who cannot afford it don't eat a meal, therefore they are put to shame as they sit by while others feast.
This contradicts a lot of the standard image of Pauline congregations put forward by mainstream scholars, who generally claim that meetings took place in houses and that the poor were cared for. This indicates the opposite -- that they were meeting in an non-residential building, such as a synagogue or other civic meeting place, and that the poor weren't being provided for, they were being left out and embarrassed. Paul's solution wasn't to care for them, it was to avoid the optics by eating your meal at home so you didn't have to eat a meal in front of someone who was poor and starving.
The Eucharist was likely provided out of funds from the ekklēsia, and thus provided for the poor, but that provision didn't extend beyond the ceremonial meal. This is all typical of associations of the period, and nothing that stands out as any different from what would have been hundreds of other groups doing the exact same type of thing for different associations.