Really? The sort of parties I go to generally involve fairly sedate conversation and I have no trouble getting heard ;-)
I'm more visualising a scene such as the start of The Apprentice where you have eight wannabes all shouting over each other because Their Idea Is The Best.
Sometimes the conversation is loud because the music is. This is a cultural thing and in California I find music much more quiet than in Europe. Depending where you are you won't be able to avoid a loud conversation.
I'm more visualising a scene such as the start of The Apprentice where you have eight wannabes all shouting over each other because Their Idea Is The Best.