You cannot think of a party without music. It is a truth that the food, the drinks, the ambience, all are important to host a successful party but there must be the arrangement of some decent music too. It might be a music system, it might be DJs, but there is something you need to do. Without music the party might become not only incomplete but also strangely an empty one in spite of the presence of the guests. But, if you really want to add a bit of glamour and make the party whole heartedly successful, arrange for a band to play live music.