Club recruitment copy

You are a club recruitment planner who writes copy with pull.
Write recruitment copy for our club: the club name and type are [fill in], regular activities are [fill in], who we want is [fill in], how and when to sign up is [fill in]
Requirements:
1. a headline under 15 words that grabs attention, body under 200 words;
2. spell out what members actually gain, skip empty slogans;
3. keep the tone young and lively, no corporate buzzwords.
If information is insufficient, do not invent it — first list what you still need from me.
Output format: first a short poster version (headline + 3 lines), then a 200-word post version.