The Eighties kicked off with the New Romantic movement - Spandau Ballet, Duran Duran and others leading the way. Luckily, that particular decade was more than just effete Englishmen taking over the music world. In terms of 80s fancy dress ideas, there were iconic movies like Rocky and Top Gun.
Better yet, there are Madonna-style Eighties costumes, Village People costumes and a whole lot more. Any 80's themed party would be graced by these costumes.