the problem with not adding coffee is that you dont have much to balance out the sweetness of the chocolate. unless you plan to use a bitter dark chocolate or chocolate malt only. I'd suggest try using a light roast or try using a different bittering agent. you should post your recipe and i could be a little more specific.
Brew long and Prosper... May the wort be with you... Yippeekayay master brewers... You had me at free beer.