Originally Posted by
Anna 
Congratulations on 45 days sober and your new job!
I wouldn't start to explain anything, A simple 'No, thanks' should be all that is required. Remember you don't owe anyone an explanation as to why you are drinking or not.
I agree with Anna. A simple "no thank you, I don't drink" is all I have ever needed. No problem. But be on guard about the drinking environment, though. If you sit in a barber shop long enough you are going to get a haircut. Congratulation on your progress.