These are communities to check out for a start (They all have decently active groups on Telegram):

For Germany, Einundzwanzig.
Twitter: https://twitter.com/_einundzwanzig_
Telegram: https://t.me/einundzwanzigpodcast
They have a telegram group dedicated to Berlin as well. 

For Netherlands, check out Arnhem Bitcoinstad
Twitter: https://twitter.com/bitcoinstad
Their Telegram: https://t.me/Bitcoinstad

Folks from Connect the World podcast are pretty cool Dutch people to contact as well:
Twitter: https://twitter.com/ctw_podcast
Telegram: https://t.me/connect_the_world 

For France, folks from LN Market have a strong community presence. 

 Yeah, thanks for mentioning us! Always welcome to connect with us and brainstorm about organizing in Amsterdam! 💪🏻

The Connect the World team:

@StefCTW 
@rindingvijk @edward 

  @jack mallers 

edward@nostr.nu helps run "Connect The World" - reach out to him for Amsterdam!!