Wine is $7.50 for "premium" - though I might quibble with their definition of "premium" (about $10-$11 a bottle in liquor store, and the glasses are small).

If this is a consideration you might consider whether one of the other clubs that offers free booze e.g. Delta might work for you. Priority Pass gets you into a number of club rooms around the country and world, including many with free liquor (even in the US), and the unlimited version it's actually cheaper than AC membership unless you regularly bring guests. It gets you into most NON-hub clubrooms of US airlines - EXCEPT AA - and into lounges in most airports around the world.

I fly AA a lot so I have both AC and PP. PP is a better value but if your travels are mostly on AA then the locations are less convenient (and sometimes unusable due to airside location in the wrong terminal).

Of course, free liquor in US clubs is probably going to become a thing of the past...USAir eliminated it in the HP lounges after the merger.