Party for about 75 people... locations? help me!

[YYZtoSFO]

I just moved to the Bay Area a little while ago and I'm looking for a place to host a party for my daughter... I think it would be easiest in a restaurant with a party room that would accommodate about 75 people... Maybe buffet/ family style would be best! I live in the East Bay and anywhere in or around the Castro Valley/San Leandro area would be ideal...

Does anyone have any suggestions? I'm open to any ideas!

Thanks in advance!