Re: DID YOU GO?
Sam will definitely be attending on account of Bucky feeling compelled to go, and Ianto on account of... feeling compelled to go. lol.
Kira, Laura and Melissa are all just kind of curious and/or suspicious. Laura is bringing guns, multiple. Kira is bringing a sword, and to make it look a little less strange is going to wear a toned down version of her fairy ball outfit since the sword sheath is matchy and she figures it's better for her whole outfit to stand out than just her weapon.
Laura and Ianto are the only ones who are entirely unfazed by the bragging and stories they overhear. They're both very familiar with the dark side of human nature. Sam is as well, but he's less desensitised to it so he's not entirely shocked but still uncomfortable and disquieted.
Kira will perk up and pay closer attention when she recognises Robert Ford, and be hugely shocked when Dolores shoots him. I imagine she had sort of a nice chat with him so she's very !!!