First of all, it's Alaska Airlines, not Alaskan.

Information about the Board Room is available here. There are phone numbers for each location, so if the link doesn't answer your question, call the club you want to try to get access to. As far as I know, only airline clubs with reciprocal agreements with the Board Room in certain locations will let you in with other than a Board Room membership. (Continental, Delta, and Northwest.) Again, check to be sure.

Day passes are available for $25/person, $15/person if you're a Board Room member and want to give them as a gift.