It is, of course, a perfectly reasonable and common request — one he's obliged many times for her without her asking. Done at the Red Keep for her, done for Joffrey. All the same, something about it seems to irk him, to put a scowl on his face.

"Do I look like your fucking Queen's Guard?"

Yes, actually, he rather does — and beyond that, he does not wait for an answer before sweeping in and doing a swift but thorough sweep of the meager room. When he's done, he begs her pardon to leave with an only faintly mocking-sounding, "Your Grace."

It's accompanied by a facetious bow, and then lo, he turns and stomps out of the tavern without another word.