With its 'owner' no longer present to do the inviting himself, one of the things that needs to be in an IC orientation is the existence of the workshop and how taking a room there works. Claudia took it upon herself to make one such announcement, but otherwise there's no real way for people to find out except by chance, and that's not how Leo would want it.

There should also be more than one way to distribute this information - the original pamphlet would work well, especially now that there are so many physical spaces/people with the Xerox cantrip, as a counterpoint to 'why is there a voice in my head telling me things,' but other people may absorb a psychic message better than reading material.