Kim's obviously gonna be there with Starbuck, but she'll talk to anyone who approaches. She'll definitely be asking Frankie about what happened with Lyle because she's observant and she'll be generally chatting with Lu and Pearl since I assume they're all at the same table. She would also totally dance with Garret if he asked her to and just cuz it would be amusing, she might try and get a dance out of Wes. And maybe even a partner swap with Tiger when Cissy's dancing with Starbuck. Lol. Edit: And like Kelly said, Kim won't be touching any alcohol and has put on a little weight so feel free to let the rumors fly, especially if someone spots Starbuck touching her belly.
Vinnie is going with Pearl so he's gonna be hanging around her a lot as well as trying not to stare at her too much. Heh. At some point, he'd dance with Cissy, Frankie, Kindle (because he's NOT gonna let her be an antisocial grump all night!) and Rocky and hang around with Tiger and Lyle since he misses both of his crazy buddies. Edit: And yeah, since he's in a good mood, he'll dance with Tiger too. Lol. But no humping!
Ana is gonna be with Adam pretty much the entire night since she wants to give Ava and Charlie their space. But then at one point, Charlie comes to talk with her and they go off for a bit to continue their conversation in private (scene in progress). She'll also approach Will as well, but if she gets blown off, she'll walk away since she doesn't want to argue anymore, especially not at the wedding (another scene that will be in progress).
Edit: Matt will definitely be attending the wedding. Since the guy is completely drama-free, I forget about him sometimes. But it doesn't mean he's not awesome! He arrived on his own, but he'd hang out with his Hawaii crew (Lu and Starbuck) and its extension since they're pretty much the only people he knows. He'd definitely ask Lu to dance, but wouldn't be adverse to dancing with anyone else who wants to.