buffet with a party/reserve room?
I have arranged for private rooms at two of the Chinese Hotel Buffets in the past, but the rooms are large enough to accomodate 100-120 people in the group.
Cafe Sierra at Universal Hilton in Universal City
Cima at Pacific Palms in Industry Hills - Room is across the hall from the Restaurant Buffet (had to talk them into it since catering wanted to provide catering at a much higher price instead)
Both hotels can set up private rooms with buffets through their catering, but the buffets will be nowhere as extensive nor as good.
Cafe Sierra at Hilton Universal City
555 Universal Terrace Parkway, Universal City, CA 91608-1001
One Industry Hills Pkwy., City of Industry, CA 91744