The first link also has... "In addition to the regular jazz nightclubs, there were also a number of after-hours joints in the neighborhood that featured jazz. The most legendary was Val's (red print mine) in the Alley, literally in an alley near East 86th and Cedar. That's where legendary pianist Art Tatum played for years, often just for beers."

Probably just a typo. OK, we know where joint was, now what was the chip used for?!

THANKS GREG!!!