Firesign performs at the Natural History Museum (!?) on June 19:

http://www.nhm.org/exhibitions/lalmd/pdfs/LA_Live.pdf
...
June 19th brings an evening of theatre and comedy with
a collage of classics from LA's Firesign Theatre, followed
by excerpts from Culture Clash's Chavez Ravine and more,
and Sandra Tsing Loh's own special tongue-in-cheek.

All performances begin at 8:00 pm at Jean Delacour Auditorium
of the Natural History Museum of Los Angeles County.
Admission is $15 for individual evenings
...

Tickets can be purchased at 1-866-468-3399 or at
http://www.ticketweb.com/user/?query=search®ion=xxx&category=misc&search=firesign

Seating is limited, so purchase your tickets soon!

I'm gonna cut the soles off my shoes,
sit in a tree, and learn to play the flute.
  -- Firesign Theatre