The 1946 Dun & Bradstreet lists three businesses in Cahokia: Double B Tavern, a service station, and Marie Vorus - Tavern & Night Club. The 1952 directory shows that Cahokia was by then included in East St. Louis. Out of curiosity, I found that Marie Voruz died at age 93 less than a year ago at Swansea, IL. Anyway, bottom line is that I didn't find any proof that the Cahokia Tavern was actually in Cahokia, IL, but I'd give it a 90% probability of being from there and almost a 100% probability of being from within 10 miles of there.
John in the Great 208