This is never going to happen, and we all know why: The world is too cold and dark at that hour. The comforter is too fluffy, thick and warm. You'll go once, feel triumphant and smug, and then miss the next day and feel like a huge, horrible failure and never, ever go again.
Commit to one morning workout per week. Go to bed early the night before to ensure success. When that becomes routine, aim for two sunrise classes a week. If you miss the same early session three weeks in a row, however, rethink the whole plan and consult Bob Greene about finding the best time of day for you to exercise.