Matthew 11:19 The Son of Man came eating and drinking, and they say, 'Here is a glutton and a drunkard, a friend of tax collectors and "sinners." ' But wisdom is proved right by her actions."
Would they call him a drunkard if he was drinking water?
Romans 14:1 Accept him whose faith is weak, without passing judgment on disputable matters. One man's faith allows him to eat everything, but another man, whose faith is weak, eats only vegetables.(vegetarians have weak faith) The man who eats everything must not look down on him who does not, and the man who does not eat everything must not condemn the man who does, for God has accepted him.
Romans 14:21 It is better not to eat meat or drink wine or to do anything else that will cause your brother to fall.
Romans 14:22-23 So whatever you believe about these things keep between yourself and God. Blessed is the man who does not condemn himself by what he approves. But the man who has doubts is condemned if he eats, because his eating is not from faith; and everything that does not come from faith is sin.
So why wouldnt we drink wine? Because it might tempt our brother with a weak conscience, to do something against his faith. Otherwise, drinking wine and eating meat while we are alone is fine.
Colossians 2:16-17 Therefore do not let anyone judge you by what you eat or drink, or with regard to a religious festival, a New Moon celebration or a Sabbath day. These are a shadow of the things that were to come; the reality, however, is found in Christ.