Cesar's oversized margaritas, in flavors including peach, raspberry, and blue curaçao, bolster chatter over time-tested dishes such as enchiladas, fajitas, and rellenos. On clear days, a rooftop deck proffers views of the skyline and cars' receding hairlines, and comfy couches throughout the eatery serve as ideal venues for contented postmeal sighs. Cesar's third floor sports two bars and a lounge bathed in ultramarine light and pulsing rhythms, which roll down exposed-brick walls. Beneath the dining room's idyllic murals and life-size replica of the sun, bottles of imported Mexican brews clink gleefully over steaming plates.