I drank during my pregnancies. On about 6 different occasions I had sptizers. I am not much of a drinker to begin with and these were "going out occasions", I was grazing all night and also drinking water and soft drink in between.
I have never been drunk or even tipsy whilst pregnant. I honestly don't believe there is any wrong with it, for me. I can't answer for anyone else and I don't need to lie. You can be responsible for yourself.
I just don't think there can be a "blanket rule" for every one, not everyone is the same. It is my choice, with in reason, the way I look after my body and my child, and why some mothers have to be so judgmental towards other mothers I will never know.