I dont know if these are too "ordinary", but some good things to check out in Downtown LA would be Angels Flight, which was just re-opened and can be ridden now. Next to Angels Flight is a small park with the "famous" bench from the movie "500 Days of Summer" (a viral facebook profile picture spot), and across the street from Angels Flight is the Central Market. There is also the new "magnet" high school near the 101, which has got some interesting artechiture to it. Of course the Disney Conert Hall. There is also LA Live at the Staples Center. One thing to keep in mind, most things will probably be closed, and the place pretty dead come dinner time.