There are a few Admirals Clubs at PHX; this is a very tiny one near gate A18.
The front desk staff were friendly upon entering. Annual membership rates vary depending on your elite level (if any) and can range from around $350-$550 annually.
Inside you'll find a very small space with seating and a small buffet area. At the buffet you'll find a couple of hot soups and a small variety of cold items like chunks of cheese, hummus, and other little nibbles. They also have tubes dispensing crunchy snacks. For dessert, try the chocolate brownie squares (very good) or maybe a chocolate chip cookie (on the dry side).
All drinks come from the bar in this club. They don't have a soft drink dispenser or freestyle machine like some other clubs. Beer, wine, and soft drinks are complimentary.
The bathroom was clean but similarly tiny.
The WiFi was pretty fast and connected easily.
Overall a small but welcome respite from the bustling concourse, and a good stop off for a drink and a snack.