Here is what La Leche League says...
Mothers who are intoxicated should not breastfeed until they are completely sober, at which time most of the alcohol will have left the mother's blood. Drinking to the point of intoxication, or binge drinking, by breastfeeding mothers has not been adequately studied. Since all of the risks are not understood, drinking to the point of intoxication is not advised.
Weighing the Risks and Benefits
Many mothers find themselves in a situation where they may want to drink. Maybe you are going to a wedding where wine will be served. Or perhaps you are going on a girls night out, or on a date with your husband. No matter the reason, you may have concerns about drinking and any possible effects on your baby. It is a good idea to weigh the benefits of breastfeeding against the benefits and possible risks of consuming alcohol. You might find the following suggestions helpful.
Plan Ahead
If you want to drink, but are concerned about the effect on your baby, you can store some expressed breastmilk for the occasion
You can choose to wait for the alcohol to clear your system before nursing
If your breasts become full while waiting for the alcohol to clear, you can hand express or pump, discarding the milk that you express
Alternatives
If consuming alcohol while breastfeeding is concerning to you, consider enjoying a non-alcoholic beverage instead. Any drink is more fun with an umbrella in it!
___________________________________________________________
Here is what I say... We are not just mothers. We are women. If we had a couple drinks before we became mothers why can't we have a couple when we are mothers? Why should we stop all pre-mommy behavior. Even LLL www.llli.org (breast feeding experts and advocates) says it's not going to affect your baby as long as you are responsible. When I found out I was pregnant I didn't drink. I am not a big drinker anyway so it was not a big deal. When I had nursing babies I had a drink or two but I consulted my LLL book to make sure I did it safely as to not harm my baby. You are obviously a very responsible woman. You are checking the facts. Don't be intimidated by people who force their opinions on you especially when they don't have the facts.