Finally I've been able to open a Jissen Kata Bunkai section of Karate Shotokan in Brussels, held usually on thursdays noon (from 12h30 to 13h30/14h00).
This is part of a "standard" shotokan dojo, where we practice during lunch time on tuesdays, thursdays and fridays.
All details on the Shotokan club can be found here: http://www.karate-ce.be/, and more info on Jissen Kata Bunkai (which is basically the only way I found to practice applied karate regularly in Brussels ) are available here: http://jissenkatabunkai.skyrock.com/
(sorry all this is in French)
Don't hesitate to contact me directly for further information.