If people like fondue i do to!
Just set a time that suits ye all and we can make a reservation in the restaurant. The restaurant itself is a pretty nice place, you can also sit and enjoy some drinks there, but and thats very important they have only Fondue at the menue (in all kind of variations).
Well just let me know what you like theres so many restaurants in Berlin and I visited plenty of them, so i can almost suit everyones taste. I personally would favour Fondue