Knight's Quest 
You enter by the door, of course, the way normal people do.  As you do so, you see another knight entering the tavern by the window. What a buffoon! 

You approach the counter.  There is a copper-farthing value menu, but there are only two items on it (the Dark Ages weren't big on consumer choice). 

You partake of the hogshead. 

You imbibe of the meade.