If they rejected all the non-size-2 PNMs, how could there be fat circling hazing parties?

Joke. Be confident. Dress appropriately and be well-groomed. Smile and go into it with a positive attitude. You in fact have an advantage, because you will have so much to talk about, not being an American. It will take you far beyond the whole major/hometown/hobbies conversation. You'll stand out for good reasons. Best of luck.