1 6-pack beer
1 small can frozen lemonade concentrate
Gin
Food coloring (optional)

Half fill punch bowl with ice. Open and pour in the beers. Add the lemonade concentrate and stir. Fill the lemonade concentrate empty can with gin (just 1 time) and add to the punch bowl. Stir and serve in small punch cups.

I've used green food coloring for St. Patrick's Day for this drink.