I frequently go to a restaurant hungry and not wanting to spend a lot of time, but I want to eat some decent food.
Where are the best places that get food to you quickly (not fast food) and you can just eat quickly, toss your stuff in the garbage, and leave. Obviously, this would probably not include a lot of places where you have servers, etc.
Zankou chicken is way up there...a bit far for me to visit frequently.
Titos tacos and El Abenejo in Culver City are great little mexican joints I frequent. Food is usually pretty fast, although there sometimes is a line at Titos (moves quickly though).
For Japanese, I like Rice Things in Redondo Beach on Artesia. Good and VERY CHEAP combo meals. Teriyaki chicken, katsu, salads, sushi, etc. You can get a complete meal with drink (rice, salad, 3 items (I think its cooked fresh...not off a steam table)) for 6 bucks.
There are some Indian places like buffetts I like going to for lunch, such as Shershwa in Marina del Rey.
Burritos, I do like Baja Fresh. Shoot me.