We're visiting Chicago for a couple days and want to get a cool dinner Friday but not really sure about waiting 1-2 hours which it seems like we would have to at Avec or Purple Pig, the two places we were thinking about. Most of the other good spots seem to require reservations far in advance. Are there any good casual friday dinner spots the locals might know of? We like all kinds of food. I was thinking maybe some place in Chinatown that's less fancy but still really good? Any tips for a nice dinner with less of a wait? We're staying in River North but willing to cab.