Advice for Casual Birthday Dinner in Brooklyn

Hey folks--
Been trolling the boards doing some research for an upcoming 60th birthday dinner and thought I'd throw out my thoughts for some feedback. Here are the details:
--mom's 60th birthday
--Saturday night, need to eat early (530ish)
--6 adults and one infant (8 mos)
--casual
--not ethnic
--preferably in Carroll/Cobble/Boerum

At this point I'm thinking either Lunetta, Chestnut or Po. I've had good meals at each (and not so good meals at some, too) but there are clearly mixed opinions on the boards about them all. Worth noting that mom/dad are not foodies, but do appreciate a well-cooked meal. So whaddya think? Am I overlooking someplace that might otherwise fit the bill? Thanks!

crm227 in Outer Boroughs

Best BBQ, no reservations tonight

four of us went to RUB last Saturday night around 830pm...waited for about 45 minutes, but tucked in at the bar for two pints of Six Points...since you're looking for casual anyway, I doubt you'll even notice the wait...food is good, too

crm227 in Manhattan