Saturday is to be sunny, so what about a walk through Paris. I though it would be good to meet just in front of opera Place de la Bastille, metro station bastille (line 1, 5, 8) arround 2pm. And we could walk along the river, so we would pass by hotel de ville, Louvre, Concorde, Pont de l'alma, Eiffel Tower etc :)
But if you have other ideas don't hesitate to suggest them.
It would be cool to have a group with locals and surfers :)
Normally I have to leave arround 7pm but still not sure, that's why I put this end time though it's possible for you to stay together longer ;)
If you have any question feel free to ask.