Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful. But his delight is in the law of the Lord; and in his law doth he meditate day and night. And he shall be like a tree planted by the rivers of water, that bringeth forth his fruit in his season; his leaf also shall not wither; and whatsoever he doeth shall prosper.Psalm 1:1-3
Do you notice in passing, how people deteriorate in their relationship with God? First, you have walking, then you have standing, then you have sitting. First we walk with the sinners. Then we stand with them, and finally we sit with them. We're one of them. One of the most important choices we make in our daily walk is saying no to some relationships that are harmful to our spiritual growth. To deny these will form a cross in our life as we yield our will to chose for The Lord. To continue in them will cause great harm spiritually. You will find it impossible to maintain your witness as you lose your communion with The Holy Spirit as you are walking outside the will of God.
1 Corinthians 10:31 (NIV)
So whether you eat or drink or whatever you do, do it all for the glory of God.