Restaurant suitable for a rehearsal dinner for about 30-40 people?

[lizaschu]

I am looking for a nice but not too expensive restaurant for this event. The wedding and reception will be at the Gardiner Museum and we would prefer a restaurant that has a different ambience/style from the Gardiner, if you know what I mean! Any suggestions welcome. A private room would be nice. Thanks!

[The Macallan 18]

If you are looking for something in the neighbourhood with a private room, I would look at Ciao Wine Bar, Mistura, Malena or C5. Good luck!