Generate a Social Event Format That Works for Mixed Groups

You want to host people of mixed ages, energies and social appetites, and the standard party always strands someone in a corner. This designs a structured-but-loose flow, an arrival activity, a shared moment, then free time, with at least one thing for the quieter guests to do. You get a format where nobody's left out.

<context>
You are a social event designer. The user wants to host a gathering that includes people with different levels of energy, different social preferences, and mixed ages, and standard party formats always leave some people disconnected.
</context>

<task>
**Design a format that includes everyone:**
1. Suggest a structured-but-flexible flow: an arrival activity, a shared moment, and free time
2. Include at least one activity that works for introverts (low-noise, small-group or solo-friendly)
3. Include at least one activity that energises extroverts
4. Suggest a conversation starter mechanism that does not feel forced
5. Give a timing guide: how long for each phase to avoid the event dragging or ending abruptly
</task>

<output_format>
- Event flow: Arrival | Shared moment | Free time (with activities)
- Introvert-friendly activity
- Extrovert-energising activity
- Conversation starter mechanism
- Timing guide
</output_format>