There was a study done recently where a woman/researcher drank alcohol and drew her blood at various points and also pumped. The result was that a whole lot less alcohol transferred in the milk than they expected. If you weren't buzzed you were certainly within the safe limits to nurse. Conservatively, some women wait 2 hours after a drink.
Nurse away. As long as you aren't buzzed you are fine. I've known moms to nurse while they drink a glass of wine. In Europe it's done. My daughter is fine and I have a glass at night on weekends and I love it. I wish it was the weekend every damn night.