If you're talking about the Friends Forever series, the original four members...Kristy, Mary Anne, Stacey and Claudia...are still quite active in the BSC.
Not in the same way they once were, though, to the point that I temporarily forgot about that aspect of the series, haha. The focus had already shifted from the club and sitting to their personal lives.
True...I didn't like the entire storyline of Stacey and Claudia fighting over some guy...that was a stupid storyline and something that was more fitting of a Sweet Valley book, not a BSC book.
But I am glad that once Mary Anne and Logan broke up, the series didn't hook Mary Anne up with another boyfriend too soon.
There is life outside of boyfriends and dating for teenage girls.
Having an idea of what Dawn is like in CD now, I'd say that she'd be a bit of a loner. Like she'd be that type of person that drifts from group to group. She'd probably be the type to keep certain friends close like Sunny.