<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by installer:
What about with a CO BF ticket?</font>
If you are departing on a CO flight in BF, you use the JAL lounge in the CO terminal. You should receive an invitation upon checkin. Not sure about access when arriving on a CO flight though.
If you are continuing in WBC on a NW flight, you can use the WorldClubs in their terminal by presenting your boarding pass.