IMPROV
Improv is excellent training for actors and writers. Learn
how to play different characters and open yourself up to a
new way of thinking. Some of these improv programs also
offer sketch writing and sitcom writing classes.
Second City
Second City's Conservatory Program is a top notch one year
program in improvisation that I highly recommend. It is
best to take the introductory improv series first or have
experience from other improv schools.
Improv Olympic
Upright Citizens Brigade (UCB)
Theatre
Groundlings
Theatresports
Comedy Sportz LA
Bang
HotHouse Improv