How about New Empire buffet, 1070 Stanley Blvd.
(at Fenton St & Railroad Ave)
Livermore, CA 94550
They have mongolian BBQ and seafood, sushi, and other chinese buffet items, not as good as some of the places in SF, but for east bay, pretty good, I have had no problems with this place, can't say the same for crazy buffet, also in Livermore.
Ther are more expensive places we can go in the San Ramon/Danvilee area which are more seafood type places. Otherwise we could go to Fashion Island acroos 92, there is that great fish market, which is fantastic but a bit expensive.
Just Thinken, Just Bob.