It depends on your goals. If you want to be 4% bf then of course you shouldn't be drinking. If your goals arent to be that or to be a professional body builder than drinking in moderation is fine. Once a week isn't going to kill you as long as you are strict with your diet the other 6 days and you do enough cardio.
Honestly people in here can't really tell you whether or not drinking once a week is going to hurt your progress. Everyone is made differently. I have a friend in particular who drinks both Friday and Saturday. The rest of the week he eats healthy and he runs and lifts weights. He is not super serious about working out just wants to be healthy and fit, yet he has a 6 pack and no fat on his stomach. It all depends on your body composition, are you ecto, meso, or endo? A lot of it depends on your genetics and your training so try it out and see how it works for you don't just take someones opinion on it in these boards because it doesn't work for them.
Honestly people in here can't really tell you whether or not drinking once a week is going to hurt your progress. Everyone is made differently. I have a friend in particular who drinks both Friday and Saturday. The rest of the week he eats healthy and he runs and lifts weights. He is not super serious about working out just wants to be healthy and fit, yet he has a 6 pack and no fat on his stomach. It all depends on your body composition, are you ecto, meso, or endo? A lot of it depends on your genetics and your training so try it out and see how it works for you don't just take someones opinion on it in these boards because it doesn't work for them.