Well, first of all, you need to just give in and start eating veggies.. I was like that too.. Unless it was a salad, I'd rather just not eat if it meant eating cooked veg.. But in order for this program to work, it's gotta be done..
As for the steakhouse, I'd suggest a chicken dish, as beef tends to be heavy.. But in reality, beef would be ok... I'm not a fan of seafood, but that would probably be best of all..
Are you doing the whole "Teppan grill" thing? If so, ask the cook for less rice and to go easy on the sauce for your portion. The sauces are really salty and sugary. Also, if you have less rice on your plate, you'll be less likely to eat it!
Stick with water and drink plenty of it with dinner, to help counteract the salt you'll be ingesting...
Last of all, be sure to tip your cook well if he does his best to help you stay on plan!
Have a good time.. My 7 year old loves the teppan stuff too..