adding c3auti entry to facilities

docs/facilities.md

@@ -54,6 +54,17 @@ supports them in handling the situation.
 * [Principles of CCC events](https://help.ccc.de/principles.en.html)
 * [Support at CCC Events](https://help.ccc.de)
 
+## Quiet Place / c3auti
+
+* DECT: 2884
+* Email: [support@c3auti.de](mailto:support@c3auti.de)
+
+c3auti organises mutual support, quiet socialising and communication aids. We focus on autistic community members, but are open to all creatures. We also help out with some general accessibility efforts on Camp.
+
+All creatures that love quiet socialising are welcome at our Quiet Place. Our Helpdesk will aid you by providing info, communication aids and social support.
+
+Reach out if you are autistic and want to provide or receive mutual aid.
+
 ## Bars
 !!! danger "Attention"
     Payment is **in cash only**. Local ATMs will probably be overwhelmed. **Bring enough money!**