New old music videos

Twisty party scene from an adventure movie "Air Seller" (Продавец воздуха, 1967). A nice dancing and the rotten capitalistic world are shown there:
It has been disclosured later, the track is actually:
Girls mass dance over a happy orchestra beats made by Vadim Ludvikovsky (Вадим Людвиковский). I like that music sub-style much although I still don't know how is it called commonly: