Knight's Quest 
There is a label on the side of the flagon, which you read without moving your lips. 
 
WARNING:  ALCOHOLIC BEVERAGES MAY IMPAIR MOTOR COORDINATION.  DO NOT OPERATE HEAVY MACHINERY OR ENGAGE IN SWORDPLAY WHILE DRINKING.  ALWAYS HAVE A DESIGNATED SWASHBUCKLER.
 
You partake of the hogshead. 

You pay your tip and leave. 

You stiff the waitress and leave.