In 1968, Francis Grasso was a Brooklyn go-go dancer filling in on a whim at the Manhattan club Salvation Too when the house DJ, Terry Noel, no-showed a Friday shift. Grasso got the job and played nothing like his predecessor: where Noel, by one account, stalled the floor with a stray Elvis Presley single, Grasso stayed on the beat. He traced the technique to one unnamed source — during Bob Lewis's CBS show, "the engineer had taught me" to hold a spinning record still and drop it back in exactly on time. He pushed that further than anyone, cutting two copies of a song into one continuous groove, until "there wasn't really guys before me" doing it, he said. A 1971 tape of a night at the Sanctuary, recorded on a fan's cassette machine and unearthed in December 2025, is the sole surviving record of how it sounded.