College Graduation Dinner for 14 People in East Bay
Pizzaiolo will do large groups with enough notice. However, the "set" menu is family style - salad, pasta course and all you can eat pizza. You can add other selections off the menu at additional cost though.
I've done large groups at Camino too which would be the upper end or maybe just above your range. Limited menu as well.
Gather in Berkeley will do large groups as well but haven't tried them for a big group.