Cover your glass in France or Germany --even worse, in England - and in the voice of someone who has personally affronted, your host will ask why you're not drinking. 'Oh, I just don't feel like it this morning.' 'Why not?' 'I guess I'm not in the mood?' 'Well, this'll put you in the mood. Here. Drink up.' 'No, really, I'm OK.' 'Just taste it.' 'Actually, I'm sort of...well, I sort of have a problem with it.' 'Then how about half a glass?