My 50-something folks will be in San Francisco next week and I would like to treat them to a great Italian meal at a romantic spot. (I will not be in attendance, obviously). My mom has some health issues and cannot walk too far, so ideally it should be within a couple blocks of the 500 block on Post St near Union square. (Or if there's a place further that is not to be missed, I can arrange for a cab as well). We're looking to spend in the $60-90 range for 2, including glasses of wine, tax, & tip. Is there anything that would be a good match? Any help would be appreciated!