Oh, well, then a small Guinness will suffice.
6 seconds sound clip from the An American Werewolf in London movie soundboard.
You can hear this line at 00:49:07 in the Blu-ray version of the movie.
Quote context
[...]
- I don't know what I'm talking about.
- I'm torn between feeling very sorry for you and finding you terribly attractive.
- A drink for a very cold man.
- Good afternoon. What can I get you?
- A Campari soda would do very nice, I think.
- Oh, well, then a small Guinness will suffice.
- Nasty business with those two young American boys, wasn't it?
- I don't know what you mean, sir.
- Yes, I'm sure I'm right. A few weeks back. Last full moon, wasn't it?
- I mean, the escaped lunatic, the one who killed the boy.
- A thousand thanks, madam. There we are.
[...]