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.
In Corinth, it's thought that the rich and the poor in the church were quite divided.  When they came together, it was in the same place, but, the rich who didn't work long hours would come early, and bring much food, and feast.  The poor, only after working, would come, but they would have only meagre food.  Paul is saying that this lack of sharing, this unconcern for the other members of "Christ's body"—i.e. the other members of the church, means the church is not celebrating "the Lord's Supper" but something else.  Unity among believers and care for one another, across all divides, including socioeconomic—and by extension, ethnic and gender etc., is expected if the church is the "Lord's body" and how we relate to one another in the church is very important to the Lord.  When Paul mentions a person who does "neglects the Lord's body" he's not talking about the communion elements but the relationships between church members.