Chez Jeanette is a cool bar to hang out in located on the same street where I have lived since I was two years old. Many trendy young people hang out here everyday where one can listen to good music whilst sipping nice drinks.
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)