Seoul searchers satisfy Korean "cravings" with "wonderful" dumplings, "sizzling" bibimbop and "dangerous" sojutinis, "all priced right" in a "21st-century hip-hop setting" (Mt. Vernon Square) or in "warmth and intimacy" (Dupont Circle); "efficient yet relaxed" service and happy-hour deals make most want to "man-do it again"; P.S. Mt. Vernon serves a late-night bar menu that includes Asian tacos.