Weddingbee boards

We had our engagement party at Fly Bar on Sutter, it has a huge private room that holds up to about 100 people.  However, we just did drinks and light appetizers, so I don't know if it would work for a sit down dinner.

Not sure what your budget is, but these are some restuarants I know have private dining spaces for large groups:

Brandy Ho's (The upper floor is available for private parties and it can hold up to 70): http://www.brandyhos.com/

Fang (by same people who own House of Nanking which is one of the best chinese places in the bay): http://www.fangrestaurant.com/#/private%20events

Betelnut:  http://www.betelnutrestaurant.com/banquets.html

Zingari: http://www.zingari.com/?section=private_dining

Wayfare Tavern:  http://www.wayfaretavern.com/private_events.html (awesome but really expensive)

Kokkari: http://www.kokkari.com/home/

Panta Rei (the lounge area is private and can hold up to 40 people):  http://www.pantareirestaurant.com/

Hope this helps! :)

I love Osha Thai...the Embarcadero location has a great private room and it is right next to Muni and Bart so it is easy to get to without having to park!