Ask HN: What is a cool thing to do in Paris?

Hello,

I just moved to Paris. I am having a hard time over here because I don't have any friends and family over here. I would like to ask the HN community about what is a cool thing to do in Paris? What do you do usually on weekends in Paris? Is there any techie group, club or museum?

Of course, I can google the same question or find events on meetup.com but I want to hear it from HN community.

NOTE: Definition of a "cool" word changes from person to person. You can interpret it in anyways :-)