Each presenter is allowed 20 images, each shown for 20 seconds each - giving 6 minutes 40 seconds of fame before the next presenter is up. This keeps presentations concise, the interest level up, and gives more people the chance to show.
It really does...
The Original Cajun Microwave Oven
Anthropologists see events such as fish fries and pig roasts as ways for a culture to redistribute wealth/energy/food resources. Rednecks, my culture, see pig roasts as a way to relieve wintertime blahs and, for some rednecks, an excuse to start drinking
We Cubans celebrate Noche Buena, "Good Night," on Christmas Eve. I believe most hispanic cultures have some kind of a Noche Buena celebration or another.