Ka Hwa, located in Diamond Bar, is a Korean BBQ restaurant where you could order various meats or even Korean-style hot pot. I went here on Saturday night and ordered seafood hot pot (hehmuljeongol) for three people, which was more than enough for everyone. The seafood hot pot had udon noodles, tofu, mushroom, fish, Korean squash, crab, squid, rice cake, and more! If you're not in the mood for pure meat, I would recommend this dish as an alternative.
Like other Korean restaurants, this restaurant serves unlimited side dishes. If something runs out, all you need to do is ask for more. Again, like many Korean restaurants, the problem with this restaurant is that the waitresses are shorthanded and are extremely busy. Don't assume that you're getting terrible service because it seems like all Korean restaurants are like this on any busy night.