Possible Clues:

• Polish maiden joins in a dance
• '. . . dancing with her out on the patio to the ----- orchestra' (Budd Schulberg, What Makes Sammy Run)
• One graduated by short steps
• Style of dance
• Dance at having got this odd sort of a degree
• No ordinary graduate dance
• Odd kind of degree in dance
• Funny start to a barn dance
• South American dance
• Dance rhythm derived from drum, basically