Been there done that - how many times have I been a few days sober only to take customers out to dinner or offer the idea of happy hour (WTF was I thinking! AIGH!!) and imbibe. I can tell you that abt 10 days ago I was at a team function for work and chose not to imbibe and I only got guff from one guy. The fact of the matter was a peer of mine ordered diet coke too. Long story short....you can do it with the help of your friends and higher power. Admit to them that you're stopping drinking and sometimes that accountability helps in social settings. Then again I've sneaked airplane bottle size vodka into my coat and drank them in the bathroom while giving appearances of not drinking.
Find some support, tell on yourself and avoid temptation.