An easy question for some of you guys.

QFF Gold means that I can enter any oneworld lounge if I have a oneworld flight that day. Eg. I am at Washington Dulles waiting for a flight with AA. Can I go into the BA Lounge, or am I restricted to the Admiral's Club?

Another question, can I bring a guest into the oneworld partner lounge?

Finally I was told that the Wing and the Pier in HKG are only open to oneworld sapphire and above only if you are travelling on CX that day. Is this right?

I would be grateful for you answers. Thanks.