I've been to California Grill a number of times and have never heard or seen that they have any special accomodation for children other than the children's menu. I have never been there with children, though.
I have never heard of this either but if there really is such a thing that would be great. We are going there in March (DH and I are having our anniversary dinner there) and are brining our 7 and 5 year old DDs. They are very good in restaurants so we are not worried, however I think they would have fun at a kids only bar.
Unless the IPO was talking about the NYE party? I haven't seen a description of it lately but several years ago someone reported about it. As I recall, there were different stations set up around CG.....maybe one had children's fare?
We were there last year with our 4 and I didn't notice anything special about a children's "bar". They had some specialty non-alcoholic drinks but nothing called a children's bar.