usually doesn't bother to go geohashing outside of meetup times, but Thursday's location is perfect: not too far (6.5km from where I live), thus easily reachable both by foot (two hours' walk from Paris) and by public transportation (RER B, station Bagneux or Arcueil-Cachan - the ticket costs only about 2€), in a safe neighbourhood, and perfectly accessible (in the middle of a quiet residential street). Moreover, I am free on Thursday afternoon, but I'm leaving this week-end. So I will be there around 16:00, and I invite other geohashers to come for an improvised "unofficial" meetup!
Finally, seeing that nobody said they would be there and that it was raining, I decided to save time and not to go there. I hope no-one has waited for nothing... (Well if you did, it's your fault: you only had to leave a message!)