I'd take my dad to Medieval Times if I didn't want to make it to Sunday. =)
They're kinda difficult. For Mother's Day a few years back I took my mom to Tru (even sat at the chef's table). Seeing her eat bone marrow was priceless. But my dad would not only hate the food, he just can't deal with the price. So it's always a trick to find 1) good food, 2) classy with good service and not "bustling", 3) not too aggressive cuisine, 4) not so boring i fall asleep.
Osteria via Stato used to fill the bill nicely, but the last two meals I had there were pretty disappointing. We used to love the place.