How a person smells should be far less important than knowing that they know about Jesus. Life change comes from building friendships and trust is born from those friendships. The choice to drink is just that, a choice, I feel as if we are called to inform them of how to make better choices to begin the climb out of the situations they are in, this will come only if we are trusted by them. You'd be surprised what can be learned from the "missing pages" of a persons life.