With the loss of the DL Sky Clubs in December, the value of my Bored Room membership fell by 80% plus and I have already decided that I will not be renewing my membership after decades there. I will research the CC options to see which fits my flying habits before it lapses in April.
It is all about my flying patterns. For the places I travel for work and leisure, DL worked more often that not. AA does not fill the bill even 20% of the time. Either they do not have a club or it is in an inaccessible terminal from where AS flies from.
Location, location, location