How To Succeed was, in its day, considered a hard-edged satire of big business, but the film is pretty similar in tone, if I remember correctly.
The first time I did the show we had quite a cast:
Me as Finch
Mike Lembeck (Harvey's son, and now director of the Santa Clause sequels) as Frump
Annette Cardona (aka Annette Charles aka Cha Cha in the film of Grease)
Linda Hart as Smitty
and Kenny Rogers' then wife, Margo, as Hedy.