So I went to the Chatsworth, CA office yesterday to submit my biometrics and it was a mess. I had a 3 o clock appointment and arrived there at 2:30 but they weren't able to process me till 3:50 and while we were waiting the lady at reception kept saying that because it was so close to closing time that some of us would have to be sent back home and told to come in another day (yeah right... I drove an hour to get there... AND I had an appointment!!!).
In any case, they were very obviously taking walk-ins. In fact, there was just one line regardless of if you were a walk-in or had an appointment. The guy who took my fingerprints told me that they don't put the walk-in option on official correspondence because "then everyone would turn up" but that they do accept walk-ins. Also, due to budget cuts, they halve the number of staff working after 12pm so if you want to avoid the long waits get there early.
