Anyone can join, with a 50-word vignette in the comments. Your vignette does not have to include the prompt term.
"Take this," said Clutterbuck, handing out laminated badges. Complete, noted Tristan, with their photographs. He suppressed a laugh as hysterical.
"Very important. You must not be admitted without a badge."
After a moment of their looking at him, he added, "I keyed it to admit you everywhere. Top secret, even."