New Years eve dinner in Paris is expensive.
Last year ,we (parents and two kids16/21)booked @the Alcazar http://www.alcazar.fr
A good compromise ,for all tastes and generations for 150 euros /pp.
Dinner was good .
The juniors loved the afetr dinner party and happenings by a skilled DJ and young ambiance.
If music or party is not a priority, then I recommend the restaurant KGB or its sister Kitchen Gallery both a few minutes pleasant walk from St Sulpice.