hi i think this is a personal choice, i dont anyone will jump on here and say there drinking caused problems, but the truth is we really dont know what effect alcohol has on a developing baby.
i would wait (and are waiting) until at least 20+ weeks and then it would only be 1 drink, no more.
i had a GF that at a party we were at drunk 3 glasses of champagne then 2 ****tails then went to do tequilla shots (i stopped the shots), i think that this is excessive.
if its the taste you want, i think half a glass would be fine. we all miss things when we are pregnant but its only 9 months.

kim