Way to be honest and it was YUK
In situations like that, where people would questions why one is not drinking. I think an honest excuse is OK. Here are a few:
I don't like how it makes me feel any more
I am cleansing or something with diet/health
I am not feeling too well right now and I don't think that is going to help
My stomach is upset
etc... I think you get the point here!
The first experience I had with people that were drinking, people I didn't know (mutual friends) I honestly came out and said I am an alcoholic in recovery.. This stopped anyone form asking if I wanted booze, or buy me shots. It was amazing, some people asked if I was OK being at the show we were at, they asked if I was comfortable, etc... They were genuine.
I was not ashamed while I was drinking
I can not be ashamed of my recovery!!!!
(that's me though)
Best of luck and thank you for posting!