I wouldn't suggest an energy drink before a workout for reasons mentioned above, however, you might want to try a cup or two of coffee before a workout.
Research on whether or not we should drink coffee before a workout is mixed but tends to lean in favor of having 1-2 cups as opposed to not.
Personally I find I am more focused and less fatigued when I've had coffee before a workout compared to when I have not.
I think it's definitely something people should try and see if it works for them.