Take a look at some of the ones I've spotted:
My fav though is the Eastern Columbia Building, a thirteen-story building located at 849 S. Broadway and is considered to be the most beautiful of Los Angeles' historic buildings, as well as its finest surviving example of Art Deco. It is easily spotted due to its bright turquoise color and it's rumored that Leonardo DiCaprio has a penthouse here. However, I recognized the building from the pilot episode of Moonlighting when Cybill and Bruce are hanging from the clock's face as they searched for hidden diamonds at gunpoint.
Oh, and this one is just funny. Rooms for $1!