From A Wiki of Ice and Fire
Liquor is a distilled alcoholic beverage.
A Clash of Kings
Daenerys Targaryen observes seamen from throughout the known world drinking spiced liquors at the port of Qarth.
A Feast for Crows
Samwell Tarly drinks rum while sailing on the Cinnamon Wind.
A Dance with Dragons
Tyrion Lannister drinks pale green Volantene liquor during supper when he plays cyvasse with Qavo Nogarys.
Qarth produces an amber-colored spiced liqueur. 
- ↑ A Clash of Kings, Chapter 63, Daenerys V.
- ↑ A Feast for Crows, Chapter 35, Samwell IV.
- ↑ A Dance with Dragons, Chapter 22, Tyrion VI.
- ↑ A Dance with Dragons, Chapter 51, Theon I.