I asked about this on Soulful Detroit Forum, and NONE of the old-time Detroiters knew about The Checkerboard Squares, or "Double Cookin' ". I also found out that Villa Records of The Magicians, Checkerboard Squares, and Oz & The Spurlings was located in The Bay Area, (not the same yellow label as Pancho Villa's Philadelphia label). Furthermore, the poster stated that all 3 of the groups I mentioned above were manifestations of the same band, with The Magicians and Oz and The Spurlings acting as the band singers in a combined all-in one, self-contained instrumental/vocalists' band. It appears to me that The West Coast Villa label was a regional, California only - distributed label (or possibly a slightly wider West Coast distribution). We never got "Double Cookin' " in Chicago, and i don't remember ever seeing The Magicians' records in shops there. Out of the half million or more records I looked through there over 15 years, i may have seen one used/beat copy in a thrift shop once, that must have been brought there by someone who moved from California. I'm guessing that Oz and The Spurlings were the actual Musicians singing, and The Magicians were a regular singing group that teamed up with The Frank Jones Sextette plus a few added strings and percussion musicians to form a band/vocalist self-contained band, like E.J. and The Echoes.