Gimmick (1921)

[Jonathon Green]

Some more.

Three-sheet: Philipp 'Vaudeville' (Fed. Writers' Project ms. 1939): 'When an egotistic performer loitered about the lobby, or the sidewalk in front of the theatre, - perhaps to "date up a town gal" or merely to let the natives know he was an actor, - this was called "three-sheeting." (A three-sheet is a poster measuring 44 by 84 inches.) Managers generally frowned upon this practise, for to permit the public to view the performers in their private characters was supposed to detract from the mystery and glamour of the stage. And so the managers regarded with disfavor certain actors who were addicted to the debunking proclivities known as "three-sheeting in front of the theatre."'

hokum: sentimental or melodramatic speechifying or 'business'
jazbo: slapstick copmedy
gravy: an emotional performance

open cold: ? without a provincial tour to fine-tune the show

in one: An act or routine that takes place in the six-foot area behind the edge of the stage.  That plus the next six feet were 'in two' and so on in six foot increments 

double in brass: a performer who both performs their speciality on stage and later plays an instrument in the orchestra.

dope sheet: prompt book
swindle sheet: the accounts

joey: a clown (ex the clown Joseph Grimaldi 1779-1837)

wow: a big success.

Jonathon Green