Buy two different brands of beer. One who's primary color is blue and one who's primary color is red. Have a large group of people get into a discussion about experiences and have a smart person, or the smartest you can find, analyze each response and if it was anything that a republican has done while in office every one take a big drink from the red one. If it was deemed as something a democrat has done in office every one takes a big drink from the blue one.