Chris/Sheldon:

Yes, most likely the 4020 Club on 4020 Ogden in Chicago (Lawndale, a mile east of the Cicero strip on 22nd st.).

Essentially Skidmore and Johnson's first place (of many) in the Chicago area. Goes back to the early 1930s at least, but likely earlier.

I have chips from the 4020 if you would like to buy some to make a set of items.

John Binder