Mamoun's! From ages 8 to 80, group of 1 or 100, 11 am to 3 am 365 days a year.
Ah, I should have known better...
I actually found this cute place called Gastronomique at Crown and High. Cute, intimate place with a friendly cook and good food.
Atticus is pretty good for single diners, too. It's very casual, but it still has good food, including a great black bean soup, and table service.
Glad to hear some advice. I'll be in New Haven for the third week this year in October.