I've been to Paris quite a few times, but it was only my last trip this past June that I ran into Canal St-Martin , near the Gare de l'Est station. I liked it because it was a
spot where you see locals and travelers enjoying a Friday night.
The Canal banks are crowded with people having picnics,wine or just sitting. Outdoor concerts were everywhere on the Friday night I was there. I saw mainly young people , but I never felt out of place as there were people of all ages. I started out the evening hearing a concert from Kemawan, a Venezuelan band that I really enjoyed. Then I heard cover bands, marching bands and of course techno. I'd suggest one go early in the evening.
As the night turns into early morning , there are a lot of broken bottles and the main thing that I playing was techno. I then saw people crowd the streets to watch blocking traffic.
It's interesting to see but then traffic gets snarled and the mood changed as honking of cars get underway. I think it captures why Paris is special and shows that Parisians enjoy their picnics like few others.