Torunn is obviously there and playing hostess all night. She'll still have a few drinks because that's how she rolls. She'll go back and forth between being behind the bar, checking in on people, talking to everyone, and making sure no one is doing stupid things with sharp objects.
I had a plan for Sara to be there, but with Laurel's disappearance, she is not in the party mood. She'll swing by for a bit to say happy birthday to Nyx and bring him a gift but probably won't stay too late unless someone really manages to distract her.
Vanya will also be there to celebrate Nyx's birthday! She'll stick around most of the night, pace herself with drinks and probably watch the skills of the people throwing knives and axes.
Tina will show up as well, she's there for all of it. Food, drinks, knives, yes, please. She'll participate in knife throwing for a little bit and then step back once she has a drink or two. Her axe throwing is not on the same level as her knife throwing, but she'd like to learn.
If there's meat, Kate is there. She will show up to eat all of the food. She'll have a drink or two, but it's mostly the food and music she's after. She's not big into weapons wielding, but she'll give the axe and knife throwing a go for a bit.