I re-titled it "Open source projects: consider running office hours" - if a bunch of different people all misinterpret something the same way that implies poor communication on my part.
This might be exacerbated with non-native english speakers which you'll see a lot around here.
The new title you suggested doesn't fix anything (at least for me it doesn't). Maybe consider using more commonly known terms to refer to the fact that your opening up you calendar to video calls with anyone that shows up?
I've added a note about the better German term "Sprechstunde" to both the article and my Calendly description: https://calendly.com/swillison/datasette-office-hours