I am aware that with 1W you do have problems trying to use their lounges after you've arrived at your final destination.
On the other hand with Star Alliance I have had excellent experiences just by producing the *A Gold Card.
I would bet you stand very good chances. If it comes to the worst scenario of being asked for the ticket out, just explain what you told us here and show them your boarding pass to that airport with a *A carrier.
[This message has been edited by pb9997 (edited 05-31-2001).]