Well, Newbury park is actually a suburb of Thousand Oaks. Most folks don't know where it is, but it runs from the 101 between the Lynn Road and Wendy Drive Exits. Just so you know, it's actually not that far from
Disneyland. I used to live up there on Ventu Park Road, and it only took about and hour and 15 to get to Disneyland, if not going against rush hour. To get there, you take the 5 freeway from Anaheim to the 101 Ventura freeway, then it is smooth sailing. Something in between would probably be in the valley. You could try Islands on Ventura Blvd in Encino, which is right off the 101 just past Sherman Oaks. It is family friendly, and has a great atmosphere, and it would be about 40 minutes for both parties to get there. Just make sure that they know it is the Islands on Ventura Blvd in the Valley, and not the one on Agoura Road, as that one is much closer to them.
Just pick something in the Valley, near the 101, and you'll be fine.
All my best ~Tina
P.S. - If they are willing to go a little further, Carneys off of Coldwater is a really great little hot dog/hamburger place, where you sit and eat in a big yellow train.

I like it, but since it is counter service, it may not suit your needs.