I commute from N. Hollywood (Valley Glen) to Vermont & Wilshire, sometimes by way of Griffith Park or the LA River but usually combining bike and subway. I don't meet too many cycle commuters on the road (more every day, however) but there is always at least one other in my subway car. Even apart from the subway, LA is a surprisingly good place to mix bike and bus to get where you are going--as long as you have all day to get there.