I'm currently sitting in the Alaska Lounge at SEA. I'm Oneworld Emerald, flying AA/BA SEA-PHL-LHR-BUD.
I didn't know whether I was entitled to enter, and unfortunately the lounge agent didn't know either: she looked it up on her iPad, and worked through some kind of flowchart, and asked a colleague, but still didn't know. Just scanning my boarding pass wasn't an option, apparently. So she gave me the benefit of the doubt and let me in (after laboriously typing my entire itinerary into her device).
So, should I be here? Or should she have turned me away?