Was flying on QR J ex-BOS. Went to BA lounge, denied entry, was told "QR won't pay for your access" (QR contracts AF lounge). As result, no shower before flight (BA is only lounge in that terminal w/shower). However, I thought oneworld policy was any passenger of one airline/program can access any partner lounge when entry criteria is met. In this case, BA lounge lists "business class" for access on oneworld.com BOS page, along with the text "Access for eligible customers traveling on any oneworld member airline.".

Was my denial in accordance with oneworld policy?