Need quiet, slightly upscale place for weekend lunch/brunch in Cambridge

This is not a break up! We just need a quiet spot outside of the house during weekend daylight hours to discuss a family issue. Has to be quiet, and I haven't been anywhere quiet lately. Don't know most of the new places in Kendall so advice on the noise level there would be welcome.

I want something slightly upscale for this...our usual haunts are the Independent, Tupelo (but we won't go back there), ECG (but we won't go back there either), Magouns, Atwood's, the Druid. Last time we went to Za we were really disappointed so don't want to go back there either (though it's a fallback).

I'm thinking of Harvest...not for the brunch, which is a lot more than we usually pay per person as well as a lot more than I can eat, but the lunch menu has lots of reasonably priced appetizers that in the range of the other places for the same kind of item. But they are closed through July 11.

The Puritan brunch is out of our price range. I love Istanbu'lu but the seating there is kind of cramped for this occasion. I know Moroccan Hospitality is quiet, but we need alcohol for this occasion! (By the way, we went there recently and it was difficult to see from the street. I hope the best for them.)

Back in the day, around 3 or so, we would be able to go sit at a corner table at Casablanca and have quiet apps, enjoy the quiet. That's long gone, of course!

Thanks for any leads.