And I think it is difficult for some of us to understand why you are even concerned who is a part of the After Party Wedding group. Are you just not that into your husband? Are you not on Cloud Nine that the wedding is over and you are now a married woman?
I get it, everyone is different. Some people are more into keeping tabs on who is "in the group" after the wedding than they are into the "OMG! I love my new husband. Let's go back to the room. We are married!!"
I do think times have changed with the whole social media thing. Pinterest has thousands of pages dedicated to After The Wedding festivities. Why on earth would anyone want to gaze into their new husband's eyes when they can post the pictures of the after party instead

Look at us! The party is still going on! We are fun people! Not for me, but I see it happening more and more.
But one thing should NEVER change. The bride should be thankful for the time the bridesmaids have given up until the moment you said "I Do". Like I said before, if a bridesmaid wants to leave after the wedding, don't be upset or angry. That's very bratty and immature.
Be gracious for everything they have done for you throughout your engagement. Hug them and say "Thank You" and move on with whatever you want to do for your first evening as a married couple.