Energy drinks aren't good for a person, somebody just died over here in my area drinking energy drinks---heart gave out and she was young, not old. I don't think they have been tested or regulated since they are a drink and not a food. I'd stay away from them. In fact, I've never drank one in my life.
club soda = seltzer water or carbonated water, I don't know what it's called in the UK.
tea or coffee is ok for you, water is better. Some people suggest orange juice and honey