It is great that you have come up with a thought of throwing a 50s party.
50s party means fun and lots of fun.
It all begins with a plan of a perfect environment and fun that you want your guests to have.
No party is successful without a proper planning.
Therefore it is important that you put it all out on a piece of paper of the ideas that you are coming up with.
If you will go vague in planning a party, it would result in a chaos where nothing will be done in a perfect way and throwing a party means to get as close to perfection as possible to make it successful.
You can start out by planning the 50s Party as to what specific design of invitations you want to send to your guests.
Since this party is a 50s Party therefore you need to design an invitation with 50s theme.
You can add different celebrities from the 50s era to denote that time period.
You can personally write the invitations as well as get them printed out, so that you can save a lot of time at your end.
In your invitation cards, you must mention that all your guests must wear a 50s costume.
A new interesting and a unique idea that I give for the 50s party to most of my clients is that they should make a soda bar, which will just make your room look like a bar.
Plug in your sound system in that room and play the 50s songs so that your guests can dance any time they want to.
Your guests can come to the soda bar where you can serve them drinks and food.
You can serve the food in trays if you have planned to watch a 50s movie where everyone can settle down and enjoy their food while watching the movie.
There can be so many other ideas that you can incorporate in your party to make it a spectacular event for everyone.