Here you can see that Regina George would be considered a part of the out-group, along with anyone else who doesn’t follow the “plastic” rules. Gretchen and Karen share their opinion that Regina cannot sit with them, and Regina tries to contradiction that. With Regina being a part of the out-group, she is not agreeing with the majority. By tone and body language you can see that Karen tries to step in to be the leader, saying that everything should be fair amongst the group. I think that Regina does not identify with the larger group because she sees herself as “queen bee” and more privileged than the others. If the scene was continued, you would eventually see that the group decided that listening to one another they realize that their group dynamic was not ideal and could have been more inclusive.