Free booze! Free booze! Free booze!
Well... not "free." You still have to pay for the Admirals Club membership, or for the premium ticket that gets you access to the club.
But the point is, people visiting Admirals Clubs will no longer have to pay for well drinks, wine, and beer. (Passengers on international itineraries already got booze. Now everyone does.)
From the email I just got (emphasis mine):
As a ...

