The outstation that I heard the most regarding lounge denials on AAdvantage award tickets at outstations is San Francisco. I don't know why but they constantly seem to tell people that award tickets does not qualify for lounge access.

The OP would normally be entitled to the Air France Lounge in ORD ( contract lounge of QR in ORD ) and the Al Mourjan Lounge at ORD unless things change.
I haven't yet seen a negative experience at ORD about wrong interpretation regarding lounge access.