Yes, Smooth Jazz also did well in most California markets, despite lower black populations there. What you say about profitability makes some sense because KTVW was the highest rated station in the CBS/Infinity Los Angeles cluster at the time.Oh, I think you're overstating it. Smooth Jazz was very popular in plenty of not-so-black cities. KTWV Los Angeles, where it originated, was one of the most profitable stations in the CBS Radio chain. Los Angeles, San Diego and San Francisco are not markets with large African-American numbers. But KTWV, KIFM and KKSF were quite successful in the 25-54 demo.
But SJ did poorly, if it ever existed, in markets like Dallas, Boston, Oklahoma City and Buffalo.
I've reproduced the list of the top 10 smooth jazz stations below, by 12+ share, in the fall 1998 report from Radio & Records. It's a bit of an eccentric list, but the best through line I could draw was high black population. Obvisouly you're right, SF and Anchorage are exceptions to that rule, but Norfolk, Detroit, Cleveland and Philly definitely fit.
That comment gives some credence to my comment about black listeners over-indexing SJ, because NYC's population circa 1999, was only about 18% black.Someone once said that WQCD was an ideal FM station. It had an audience that was about 1/3rd white, 1/3rd black and 1/3rd Hispanic, just right for NYC.