A couple years ago, I discovered that people in other countries throw American theme parties. It was, and still is, hilarious. So for those who don't about this amazing phenomenon, let me fill you in.
American parties are held at clubs...
... or house parties.
The #1 thing people are obsessed with outside the states are "red cups."
Therefore the most important thing for an American party is red cups.
It is not an American party without red cups.
There might be a tower of red cups.
Or, if you're really lucky, you might find waitresses dressed as literal red cups. It's really that important.
Also please note the women in the background wearing red cups as hats. Iconic.
At an American party you'll also (obviously) find beer bong.