Open since 1969, this brick-walled subterranean restaurant is revered by Columbia students and neighborhood regulars for its well-priced, authentic Greek food. Symposium is a mecca for Mediterranean specialities: gyros, moussaka, spanakopita, souvlaki, and more are served in heaping portions and with plenty of pita on the side. The ambience is definitely old-school -- expect a lively "opa!" from the waitstaff when a flaming plate of saganaki cheese dip arrives on a nearby table -- but it's all part of the restaurant's charm. Make sure you leave room for the perfectly flaky, baklava and custard-filled galaktobouriko for dessert.