"Sire, this isn't necessary," Merlin said.
"I'm sure it is. You have been spending far to much time here. Barkeep!" Arthur yelled the last word.
"Yes My Lord. What can I get for you?"
"Nothing! But you can, from now on, refuse my servant service!"
"Yes." Arthur waved in the vague direction of a cringing Merlin. "He's been spending far too much time here. If he refuses to leave, then call the guard, they will deal with him."
Merlin wilted further. The tavern owner looked confused.
"I'm sorry Sire, but as far as I know, I have never ever served your servant ale."
Arthur frowned. "What?"
"Your servant has not frequented this tavern My Lord."
"How many taverns are there in Camelot?" Arthur asked.