at first I thought you were asking if you could use a DL F boarding pass to gain access to the alaska boardroom but after rereading I assume she has F on alaska in which case she can use the Alaska boarding pass to get into an Alaska boardroom on the same day of travel. I kinda take issue with the fact that U fares arent allowed the same access as an F fare. After all most of the U fares are frequent flier MVP or MVPGs but I guess if they did that nobody would pay to join