Well, since I am a member of the LDS Church (Mormons), let me state that drinking coffee is indeed off limits because of ingredients that are harmful to our bodies, e.g., tannic acid, among other things. However many of my fellow church members will drink Coke, Pepsi and yes, hot chocolate. There are certain things we are directed not to put into our bodies and other things where we have to make that decision for ourselves. Just as there are many church members who will drink the products I've mentioned, there are just as many who will not.

Just like no one has to tell you not to jump into an empty pool, we are provided guidance in some things but are asked to think for ourselves about other things. I hope that helps.