I don't know anything about proper clothing, but since "red-letter day" brought up THE SCARLET LETTER, I do have a mildly cute SCARLET LETTER story, although it may be too early in the day for some people to read it.

Back in spring of 2003, RADIANT BABY and F***ING A, a play based on SCARLET LETTER, were playing at the Public. Heading toward RADIANT BABY, the freshly scrubbed, wholesome ushers were announcing "RADIANT BABY is to your right, bathrooms for RADIANT BABY are to the rear, etc." and that was nice enough.
But when I wnet further into the lobby, similarly freshly-scrubbed, wholesome ushers were sweetly announcing, as if they were the most natural words in the world, "Elevators for F***ING A are to your left, bathrooms for F***ING A are in the back, if you're picking up F***ING A tickets, just follow the sign."
Maybe you hadda be there, but it's one of my fondest Public Theater memories.