There's nothing pompous about this French bistro, where the informal, come-as-you-are ambience makes it all too easy to become a regular. And by the looks of it, especially on Sunday mornings, when Littleton residents sashay in for brunch, there are plenty of regulars who crave JaJa's dazzling crepes, filled with everything from smoked ham and Swiss to scrambled eggs and bacon, to sunny-side-up eggs and sausage, to Nutella and sugar-kissed bananas. The unfussy elegance, coupled with the camaraderie of the ardent habitués who linger over Bloody Marys and bottomless mimosas, makes JaJa's Bistro a must-stop for both wistful Francophiles and card-carrying foodophiles who want a little joie de vivre with their morning pick-me-up.