What would be a good topic for English Second Language tomorrow night?

I usually prepare a 500 word paper with vocabulary words. It is for advanced students and they are there to mainly expand their knowledge of American culture. I have done previous topics of Mardi Gras, American football, baseball, horse racing, St. Patrick's day, guns, movies broad categories with a lot of emphasis on the rating system, music covering popular American music, cars, and the rodeo. I am feeling sort of empty tonight and would like something else to talk about? Thanks for your answers.