In a large bowl combine Hibiscus flowers, orange peel, cinnamon sticks, and ginger. Add boiling hot water. Allow mixture to steep for at least 2 hours. Up to overnight is fine too. The longer it sits, the stronger the flavor.
Strain sorrel and sweeten with sugar to taste. I like a cup but you may like yours a little bit less sweet.
Chill sorrel. Feel free to drink as is for a great non-alcoholic drink.
To make Cocktail: combine rum and sorrel over ice and finish with a squeeze of lime.