Through 12:00PM CDT on Thursday, October 24, 2013, American is selling Admirals Club day passes for 30% off. Ordinarily the cost to purchase a day pass is $50, though through this promotion they can be purchased online for $35.
It’s still not a bargain, really, but do keep in mind that these are day passes and not single access passes, so if you’re transiting multiple airports in a day it can be a fairly good value. Given what you’d otherwise pay at many airports for wifi and drinks, this can definitely be a decent value for someone that doesn’t otherwise have access. The passes are valid for a year, so are quite flexible.