The Columbia of "50s beatniks and "60s rebels lives on. In pleasing contrast to the area"s newer upscale cafés, Symposium is casual and low-priced, and the menu is illustrated like a hippie comic book. Unfortunately, mellowing out seems to have led to occasional nodding off. Traditional appetizers are well made, especially the namesake salad, a platter of delicious dips and saganaki (baked kasseri goat cheese that arrives aflame). Roasted lamb and grilled fish were satisfying. But moussaka and lamb pie were underseasoned, and the cooked-to-oblivion side vegetables were indeed a "60s flashback.