Is it wrong for believers to eat together at church?
No, it is not wrong for believers to eat together at church; a potluck supper once in a while is permissible. The problem in Corinth was abuse—gluttony, drunkenness, and dividing by social status—not the shared meal itself. Paul confronted the selfishness and division that corrupted their fellowship.
Les teaches that there is nothing wrong with a potluck supper once in a while, and he is not one to say believers cannot eat when they come together. In the Corinthian situation, the abuse was the problem: the wealthy brought the best wine, meat, and vegetables, while the poor overindulged, becoming gluttonous and drunk. Then the people separated themselves during the supper according to cultural status, with the wealthy refusing to share. Paul was shocked and reminded them they did not come to church merely to fill their bellies. So the sin was not eating together but the selfishness, excess, and division that corrupted the fellowship.