Hi Ron -
Just to add another dojo (mine!), aikikai style: you can try the dojo of Jacques Bardet (he's 6th Dan and Tamura's disciple ). It's conveniently located right in the center of Paris (Chatelet) ;Jacques is a very nice sensei and the atmosphere is friendly, mixing a lot of high-ranked aikidoka to beginners. You can check out times at www.copc3.org/web/rubrique.php?id=9
We like it very much to have exotic foreigners!
Hope you get the best out of your trip!
All the best,