Ok, since this is particularly relevant to me today, I thought I'd start a thread on the subject.
The situation is as follows: You're going out for a meal with friends, you're driving and you can't crash over because of work the next day. You've got approximately 3 hours till you need to drive home, so you feel it's safe to have 1 drink of 2.5 units or less.
What do you have?
If you're really fussy about what drinks you have with a particular meal, assume the meal is a curry.