I visited a wonderful bar in Paris, it is a rock bar, Cantada - L'Ultime Rock Bar. They are located at 13 Rue Moret, 75011, in the East side of Paris. The website is Cantada
The manager is a nice young French man, with a good English, very pleasant to talk. They have rock shows downstairs very often....
I was there Friday at 2 AM and stayed until 4:30 AM. They have a menu of more than 50 absinthe brands, most of them are Swiss or from Pontarlier... A few from other countries. I tried two, Duplais Blanche and Roquette.
The bar has a wonderful atmosphere, with interesting artwork. The "ambiance" is very friendly. And they also serve GOOD COFFEE at 4 am !!!! (I needed to be awake until the sunrise at 6 AM !)
I strongly suggest you to visit this bar if you are in Paris. If you like rock, check their shows. If you don't like rock, just go late, after the show is over, and enjoy their selection of absinthe and good people to talk.