The very first place i've been in Paris.
My first month in the city, i spend over 800€ in this bar (true story)
It's simple, warm and friendly, drinks are not so expensive (for Paris...). You can talk with every body, people there are open minded and funny (but only because everybody is drunk)
Architecturally stunning, a beautiful and harmonious space showcasing contemporary art. I've often seen some amazing work here and been introduced to new artists making great work. There is a beautiful outdoor space, with installations by Agnes Varda.