Emma is there and isn't drinking as much as she normally would, unless someone tries to persuade her otherwise. She's got a lot on her mind, and strangely enough, that makes her drink less. But she's good at holding her alcohol, so it doesn't slow her down all THAT much. She's as cheerful as ever, nudging folks, trying to get them to dance, talking bluntly and likely loudly, and having a lovely time. She does need to leave at the end of it to go home and take care of the beasties, though, so she might asked to be sent through a Floo at some point.