No problem: 50's Prime Time, Sci-Fi, Mitsukoshu Teppenyaki, Kona Cafe
Clearly disappointed and a bit snotty: Jiko
Waiter acted as if he'd never heard of such a thing: Dinner at CRT (This was before the changes to their dinner. I haven't paid enough attention to the new CRT dinner to know if sharing would even be an option anymore.)
In both cases where the waiter had an attitude, I just held my ground and got dinner as I intended.