[Alan in CBR]

The Flagship Lounges have open bars, but the Admirals Clubs have cash bars. As a non-AA oneworld Emerald you are entitled to drink vouchers. They should give out two at a time, but some will do one at a time. Don't be afraid to ask if they "forget". Also, they should give you more if you run out. This is an undocumented feature, but fairly well understood.

Note that a $1/drink tip is still expected. Not compulsory, but expected.