There is no way to determine an exact number and I think you know that. You would have to be more involved in a person's life to know that. Some people can have a beer or two and carry on with life easily. Recovering alcoholics may not be able to have any. Knowing your history and the things you do for addicts yourself, you would be able to tell me a better answer on that. As for myself, I pray about giving me the strength on issues in my personal life that may seem bad for my physical and spiritual health