What are some of Chicago's quietest, high-quality restaurants?

Folks, I love the wealth of knowledge on this sub. I'm looking to tap into the collective's knowledge of quiet, high-quality dinner spots.

My 90-year-old grandmother loves great food and great hospitality. What's grinding her gears lately is her inability to hear and participate in conversation around the dinner table at most restaurants when we go out to eat. Loud music, poor acoustics, and crowded spots are all frustrating her, and she has lost a lot of desire to participate in one of her favorite activities: sharing a meal with her family out on the town.

Where have folks been lately that stand out on the low-decibel front? Bonus points are awarded if they offer comfortable seating; no bonus points are awarded for set menu spots, as Granny likes to decide what she eats.