Well, I think the dojo is in the 1st arrondissement (i.e 75001) but if you cross the street you are in the 3d (75003). I usually train in the other dojo of the same sensei which is in the 20th. I thought you'd like to begin at the Eiffel Tower
, go down the Champs Elysees then a bit of the Rue Rivoli
and then a little aikido there at Chatelet-les Halles
and then a quick visit at the Contemporary Art Museum (called Centre Pompidon) (the colorfoul building with pipes poping out from everywhere close to the dojo), and then back in time to catch the last aikido lesson of the day
Then of course if you go to the dojo of the 20th, you can visit a part of Paris that few tourists know
: a very lively neighborhood full of artsy "ateliers", little cafes and an atmosphere of North Africa.
Yes, if you try all the suggested dojos of this thread, you'll know the area in no time!
Hope you have a nice time!