We all know that kids love have themed birthday parties. From spider-man to my little pony there are so many options to choose from! Some people think that having a themed party for an adult just isn't 'cool' anymore, well I'm here to tell you that it's simply not true! A theme not only helps people know what to dress, but it also gives you lots of exciting options for decorations, entertainment and all the other bits and bobs. 1. Great Gatsby The easiest way to tell you how