Ingredients: tinkly music boxes, short wave radios, free-jazz, blues guitar, beat poetry, smutty poetry, a Dada sensibility, a smart-ass sense of humor, sound effects, even an actual song or two. All common strategies now, but must have been fairly incomprehensible at the time. And yes, they did do gigs in laundromats. It's not like there were too many actual music venues in town to play.
Fee listen/download:"The Roots Of Madness"
One of the members, Don Campau, went on to a still-extant experimental music and public radio career.