Drunk!Harry and Drunk!Greg
Greg's first reaction to being gripped was to tense up - ready to shove Potter away if he tried anything. Fortunately, the alcohol still pleasantly floating in his system dulled his physical response time to something that more closely matched his mental process and saved him from actually shoving Potter to the floor.
"Lots of people were invited. They didn't all come." And why Potter, of all people, would actually turn up was a problem that would both Greg for days, unless he got a better answer. "You read my list?" Greg had left it public because he hadn't known who'd been invited, but he was still surprised Potter had read it. He tended to avoid Potter and Weasley's journal entries as if they might bite him.
He was about to protest that he obviously wasn't a House Elf when Potter continued his rambling and somehow managed to stumble without actually moving anywhere. "What?" He asked, frowning harder than ever. "I didn't put anything in your drink. I didn't know you were here."