I know it's a stretch, but if someone or their org wants to come, by all means do!
Every year my party organizes Manifiesta festival. It's a leftist festival with music, debate, sports, film and food and it takes place in Oostende, Belgium.
Topics of debate and guests of this year include, but are not limited to: Chris Smalls (the Starbucks Union guy), debates on Niger and Burkina Faso, Cuban and Palestinian comrades, Jeremy Corbyn (yeah, I know lol) and many more. There will also be free leftist movies to watch, local food and drinks and countless of other activites. Oh, and I will be there as well lol.
Anyway, here is the website for those interested :)
A mix. There are debates in Dutch, French, English, Spanish. I guess it depends on the speaker of the topic.
What kind of topics are debated?
Edit: nevermind you talk about it in the post
Syndicalism, feminism, anti-imperialism/capitalism, local Belgian topics, international topics, climate change. Basically most leftist topics get talked about.