[Oh, bugger. He's obviously having a mental conundrum for a moment because he doesn't know much about the British justice system for Muggles. He knows the basics to keep out of trouble and that was about it. He isn't even sure why he's worrying so much. Plenty of people here know he's a wizard and some are even familiar with his world (which is still weird).] I don't know much about it, so it could easily be similar. I, er, wizards follow different protocols. You can say...

[He tugs at his own sleeve nervously.]

Oh, uhm yes. I'm not really a fan of coffee though. My brother is, but not me. I'm also not fond of champagne either, but that's the drink of the evening. As you said...