Makes 8-10 servings.
Combine all the ingredients except the beer in a large punch bowl and stir well.
Top with the beer, and add several large ice cubes.
Garnish with orange and lemon wheels.
*Cinnamon pear syrup: Combine 1 cup demerara sugar and 1 1/2 cups water in a saucepan, and bring to a boil over medium-high heat. Reduce it to a simmer, add 1 pear (thinly sliced), and let it simmer for 45 minutes. Remove it from the heat, add 2 cinnamon sticks, 5 cloves and 2 pieces of star anise, and let steep for 1 hour. Strain out solids, allow it to cool, and store in the refrigerator for up to 1 week.