My Gold Mastercard comes with a free Priority Pass card (two years running now.) I find it works almost at every airport. The club they use may not be the best at the airport, but I have a place to go. Recently they have added a bunch of DL Crown Rooms. I am DL PM so I usually stay at DL, but I think Priority pass would be a good deal if it is not too much $. Certainly would be cheaper then joing 2 or 3 airline clubs.