When I was a kid I drank coffee every morning.
As an adult, except for the occasional starbucks(won't be drinking those anymore), I don't drink very much. My trainer suggested coffee or tea to me for in the morning before workout to boost my energy. I don't put sugar or milk in either of those though. I would say one or 2 cups a day are fine as long as you are not overdoing it with the cream or sugar(half/half sweetener).