D..
You did the right thing. Her close friends decided to use other women to subsidize their fun. I will just bet you that the bride did NOT know this. Her bridesmaids/close friends put this together. She wanted "more the merrier" and invited gals from work, too. It's a shame that she didn't talk to them about their ideas in advance so that they would know that their plans to push women who aren't close friends into paying something like this weren't appropriate...