So can I blame him for hardcore dancing then?
Yeah... this was a mistake on my part.
Dancing as in steps and choreography and communication through movement to music.
Not just random flailing or listlessness. He helped invent the lindy hop, the swing dance of the 30s and 40s. He had nothing to do with mosh pits or bump and grind. The first time a young man threw a young woman across the room and she landed with her feet still doing "right, left, right-left-right" in time to a 4-4 jazz number, that was Frankie; the band shut up and the drummer followed her through the air with a crash when she landed. He helped invent a classic style of dance for a classic style of music.
Then he became a postal worker, because big band jazz went away. Forty years later, swing came back and he got to live his dream again. And now he's dead at the age of 94. He was a world traveler and he liked to tell stories and he loved to dance.