Hal Zeiger
Hal Zeiger was a promotor of rock and theatrical venues. He was also manager of Johnny Otis in the 1950s. [1]
Zappa mentioned Hal Zeiger in the sleeve of Freak Out! (1966), under the heading: "These People Have Contributed Materially In Many Ways To Make Our Music What It Is. Please Do Not Hold It Against Them".
Zappa about Hal Zeiger
"Hal Zeiger (one of the first big promoters of rock entertainment during the 50s) says, "I knew that there was a big thing here that was basic, that was big, that had to get bigger. I realized that this music got through to the youngsters because the big beat matched the great rhythms of the human body. I understood that. I knew it and I knew there was nothing that anyone could do to knock that out of them. And I further knew that they would carry this with them the rest of their lives." - Frank Zappa in The Oracle Has It All Psyched Out, 27 June 1968, Interview in Life.