All of my examples involved people being exposed to loud music. Of course if the original poster can avoid being around loud music than she ought to be ok provided she wears earplugs and asks the other guests to not yell or clap their hands too loudly, especially if they are sitting close to her.
The fear of there being music is no reason to miss the whole event if she doesn't want to. That's the point. She can leave if the music is too loud, or use ear protection if she's comfortable to stay. It's about mitigating risk; not avoiding social events altogether.