I'm in a club of about 10 people. The de facto leader clearly has her favorites and can be very PA about it. By this point everyone, including the "favorites," keep going despite the leader, not because of her. Last year we had two separate members get married (not to each other), Emily and Jane. Emily is one of Leader's favorites and Jane is clearly not. Leader turned one meeting into an engagement party for Emily, but left out Jane. Both women invited us to their bridal showers. Leader showed up to Emily's and not Jane's. Leader never RSVP'd to Jane's wedding and opted to go camping by herself that weekend but made a big deal about showing up to Emily's, talking about it for months beforehand and afterwards. For the record, Emily did not seek the attention and kept trying to redirect it away from her and towards Jane.
Now both Emily and Jane are expecting babies. During this week's meeting, Leader very dramatically announced that she was throwing a baby shower for Emily and told us the date. Everybody looked a little worried until Emily said "You're so sweet to offer, but that day is Jane's baby shower."
When Leader asked why she was the only one who didn't know about the shower, Jane said, "Well, you showed no interested in my engagement, bridal shower or wedding and didn't even react when I announced to the group I was pregnant, so I didn't want to Emily to waste her time making you an invitation."
And with that, we all walked out of the meeting.