http://www.buzzfeed.com/mjs538/this-is-what-american-parties-look-like-around-the-world

1. I don't understand why this is a thing.

2. I totally get the hamburgers, but I don't understand the popcorn part of it. Popcorn is not ubiquitous in the States. It's mostly for movie theaters, carnivals and maybe sporting events but that's about it.

3. Why the red cups? Because some country singer had a song about it or...? Don't get it. Yes we use plastic cups for casual parties, why is that noteworthy???

4. What's with the basketball stuff? At least 4 pictures with basketball jerseys or hats. Americans don't really like basketball too much, not compared to gridiron football or baseball, both of which are more popular. Maybe it's because these people listen to rap music?

Edit: since apparently I gave off the wrong impression, I should add that I am not offended in any way. I think it's kind of funny and silly and I just don't understand why anyone does it. But I am not offended by it in the least.

They are just stereotyping the US, based, presumably, on popular media and/or college parties in the States (given the demographic seemingly throwing the parties). I think it is hilarious and I would love to go to one, if only to see the Bizarro-World-esque take on the US culture. All in all, it seems pretty harmless and is no worse than how we would throw a party based on another nationality here in the states.

Edit:
As for the basketball thing, I guess it is because basketball gets far more coverage in the EU than American football (or baseball, which is still called "America's Game" here, afaik)? Basketball is also pretty much undeniably an US invention, while football and baseball are based, at least in part, on European predecessors.

I think you're taking it a bit personally. Pretty sure the ancient Greeks and Romans would have been a little perplexed at our toga parties as well.

Oh I wasn't complaining, I think it's quite funny. I just don't know why people would do it. I think I'll try picking a country at random and making a party themed around that, it's odd but neat.

In france for instance, there are foodstands in cinemas, but people hardly use it. The only time I went in an american cinema, buying food and snacks and drinks seemed mandatory. Furthermore, I wouldn't know where to find a public popcorn seller in France.

Oh yeah, I didn't mean to suggest you were complaining. I was just giving my take on it. I am glad you posted about it, because I also think it is pretty neat.

I see. I'm finding the red cups thing a little puzzling too, though, what doesn't make sense about using disposable cups for a large group of drinking people? Maybe they don't play beer pong as much as they do around here? Personally I think beer pong is retarded, but, other people seem to enjoy it, so...

Yes exactly, and in fact the only place I remember seeing Popcorn by the ton, is in EuroDisney.
You shouldn't have let Disney and Hollywood be the promoters of American culture in the world :)

Sidenote : this time when I went to an american cinema, I tried red vines because it seemed like my kind of stuff. I really loved it, and wouldn't have even heard of it otherwise (even if it's very recurrent in movies/shows).

I didn't know this was a thing.

#4 is perhaps because the US is pretty much the undisputed No.1 in Basketball.

Because some people have too much money to waste, too much time to waste and no taste.

Technically basketball was invented by a Canadian, although I guess the U.S. took to it more and left hockey for Canada ;)

The red cups...in my admittedly limited experience with Europeans, I got the sense that Americans' use of disposable and/or plastic cups, plates, and utensils, many of which are red, is considered cheap and tacky. Just one of those odd things *shrug*

Hmm, surely, can't say where some of these ideas about the americans come from - the popcorn at least, I wouldn't say that this is typical american - more as you said, typical for a cinema.
On the other hand, it 's really about stereotypes. Would be sure, most people around the world who would make german themed parties or topics would went for sauerkraut, bratwurst and lederhosen. For the most germans that would be mostly hilarious to see.
For me at least. ;)

That's a good one. How about this one though? Has all the jingoism (we just call it 'nationalism'), bravado, over the top presentation you need. It's basically a 3 minute how to guide on being an American, singing this should probably replace the questions about the Constitution on the U.S. citizenship tests.