I'm driving is a good answer so it is a good idea to make it a truthful one where possible by driving to things like corporate events
Personally McFearless at 14 days sober I would really try hard to avoid being around drinkers because of the likelyhood of answering C - "yes please I'll have a large one" Obviously it is not possibleto avoid contact with alcohol altogether on a long term basis but it was something I know I had to do in the early days and I still keep contact with drinkers to as little as practical