The Federal Theatre Div. of W.P.A. presents "Help Yourself
The pattern
This still is filed under Event symbol poster.
Define
A symbol or allegory that makes an event feel like a destination. Not a timetable. A magnet.
Mechanism
Attraction by emblem. Date and venue ride under a picture that already means come.
Verdict
We are filling a room, a night, or a run of dates
Why it works
Three colours and three shapes carry the whole thing - orange field, cream figures, red type - so the poster survives being seen at distance, at speed, in bad light, which is the actual working condition of a window card. The silhouettes are deliberately unresolved: two people mid-gesture with no faces invites the viewer to supply the joke, which is cheaper and stickier than illustrating a scene. Setting the venue on a steep diagonal across the figures breaks the vertical stack and stops the layout reading as a list. The title being an imperative lets the display type do double duty as headline and as tone-of-voice sample for the comedy.
Steal this when
Use this when your product name is already a verb or a command and you can let it be the entire headline with no support line. The orange-cream-red flat stack is also the right move for any single-colour-ground design that has to work as a thumbnail and as a street-level poster from the same file.