1 Corinthians 11:18, what kind of divisions actually?

1 Corinthians 11:18 > In the first place, I hear that when you come together as a church, > there are **divisions** among you, and to some extent I believe it. My question is already there by reading verse 18. However, after reading the next verse, 20 to 21 : > So then, when you come together, it is not the Lord's Supper you eat. > For when you are eating, **some of you go ahead with your own private > suppers**. As a result, one person remains hungry and another gets > drunk. From the bold sentences, my guess of the divisions is something like this :
*There are some who agree to "go ahead with their own private suppers",
but there are also some who don't agree to "go ahead with their own private suppers".
The group who agree, don't care to the hungry (the poor).
The group who don't agree, care to the hungry (the poor).* But since I realize that my guess above is only my own imagination, that's why I post this question. Thank you.