I dont really have "official" recommendations but I have a few points I can throw out. I have been either working or partially living in the are for only about 3 years, so im by far no dining expert. I should also add, while it may be a crime living in this are, im not a big seafood fan.
For Good Mexican:
*Michaels in Marina, basically anything they make blackened is amazing, about $9 a person. Fast too. (Large groups could be difficult, I also think there is a sister store in Carmel)
*Turtle Bay in Seaside, great food with a seafood twist, also next to Fish Wife (I believe?) They own both. Also very fast and affordable. (Outside and inside seating, most larger groups should be fine)
Thai:
*Thai House (I think it has a couple names) in Seaside, by all the Auto Dealers and a 7-11, VERY fast service, really good Thai food. (Larger groups should be fine, probably call ahead because they may need to re-arrange tables)
There is also a Thai place in Marina but I can't recall the name, its a small house looking building and I believe your first right off the 1/Del Monte exit if you are going south. (Large groups would not work here at all)
Cajun:
Best Cajun food you can find in CA (IMHO).
Ferdi's in Seaside, unfortunately the last time I was there they were not open on weekends.
740 Broadway Ave
Seaside, CA 93955
Phone: (831) 394-2244
The gumbo is amazing! You might want to call and see if they are open on weekends yet, they also have a Deli. (Its a smaller place, if its going to be about 6 or more you probably want to call ahead)
Japanese:
Sapporo in Monterey near the warf. Everyone has probably seen this one.
Teppanyaki and sushi. Can accommodate large groups but as a very commercial place you would probably want reservations.
Well, off the top of my head thats all I can think of. Plus the wife is calling me to the easter happenings. Hope that helps some.