What about contacting the organizers of BitDevs Paris, BitDevs Berlin and BitDevs Amsterdam, nostr:npub1cn4t4cd78nm900qc2hhqte5aa8c9njm6qkfzw95tszufwcwtcnsq7g3vle?

https://bitdevs.org/cities
https://bitdevsamsterdam.org
https://bitdevs.berlin
https://t.me/BitdevsFR