This thread started off with someone asking how NOT to look like an American. It's true that as soon as an American opens his/her mouth he/she is going to be pegged for a foreigner. I think the issue is how to blend in as much as possible. Some Argentines affect an "American" look but by their physical appearance and demeanor they are clearly Argentine. In general Argentines are conservative dressers who go for a classic look, especially among professionals. Dressing simply helps one to blend in. Argentines can wear shorts and baseball caps and still look Argentine; Americans can't so if they want to blend in a little they should be more conservative in their dress when in Argentina.