You will usually find that a couple of key pieces are enough to set the tone of your room and you don't need everything to be retro unless you want your room to look like a piece of history frozen in time.

It is no good putting a wonderful sixties refrigerator together with an art deco style kitchen chair and a seventies toaster. It is best to choose your era and stick to it. Styles of the Art Deco Years Art Deco is really on the edge of what we might classify as retro. You may be able to make it work if you a genius at home decoration but it is unlikely. You need to pick your style before you start so that your room hangs together well. Retro styles are very popular these days and with good reason because they are a great way to get clear about the style of room you want and they add a fun element to your room too. But retro is not a single style as each era had a completely different style of everything from curtains and valances to kitchen tables and stoves.

(Before that period you could classify original pieces almost as antique rather than retro and with the prices charged for Art Deco I expect this.