I recently learned that Paul and Jane went to this party dressed as the Pearly King and Queen, which is a Cockney British tradition. The name came from the fact that pearls were sewn on their clothing.
|Here is an early version of the Pearly King and Queen. You can see where Paul and Jane got their inspiration for the costumes.|
|Here is the 1960's version -- much more "hip." Looks like Paul and Jane with with the traditional version.|