If you're still in Paris and have some free time left, there are three places I'd recommend you to check:

  1. A. Lacroix - the best patisserie in Paris (I swear), right by the Notre Dame.
  2. 59 Rivoli - a strange and lovely aftersquat that hosts resident artists of all sorts and kinds, absolutely lovely. 59 rue de Rivoli.
  3. Dernier Bar - also in that area, a geeky pub with amazing things. And if you do end up there, go in the evenings (after 19:00, not on Mondays), and check out the lower floor.