I would like to see you at the annual 2 days tech event FOSDEM in Brussels, Belgium. I attended the event in February 2024 for the first time.
The event is structured with developer rooms. These mean The vast majority of events (talks, hacking sessions, open discussions) are held in so-called “developer rooms” (“devrooms”), which are organized and managed by open source projects themselves, or even associations between several such projects on a common topic in order to foster collaboration. according to the linked page. In the 2 days event, each devroom is held in a room intensively.
There was the Ruby devroom in the last FOSDEM 2024. I was there for some of the sessions.