I like icons personally cause when the event doesn't have a theme, they provide a sorta strand tying it together in some way. Also they are the host. You know, of the Halloween event/party. You kinda need that at a party. The Master of Scaremonies, all that jazz.
But in all seriousness, while I love the icons, I don't think they are needed. I would prefer them, again them being the host and all that, and without a host it just feels... disjointed, but they are not needed.