Answer 1

You could try inquiring masteringvoiceover website because all of their classes are ongoing and they also offered 2 hour private intensives anywhere in Los Angeles. But it is wise that you should compare prices of the classes to other classes so that you could get the classes that are convenient for you.

Answer 2

The best classes in LA are offered at Kalmenson & Kalmenson in Burbank and/or The Voicecaster, also in Burbank.

Good Luck

Answer 3

Go to everythingvo.com and check out the Voice Over Resource Guide.  It lists all coaches in Los Angeles.  I personally recommend Rick Zeiff's classes.