Place sugar, water and fresh cranberries in a small saucepan. Heat over medium-low heat, for 10 minutes or until cranberries just begin to burst. Remove from heat and allow to cool completely. Can be made 1-2 days in advance. Strain syrup and reserve cranberries.

Add lime wedges and mint leaves to a glass; muddle. Add 2 ounces of rum.

Fill separate glass with ice and 8-10 reserved cranberries. Pour in muddled lime, mint, rum mixture. Add 2 ounces or more of simple syrup. Top with Club soda.