A trio of restaurateurs with Greek roots have opened a high-end, Crete-inspired dining room near Dupont Circle. Balos, with a wide-ranging menu of whole grilled fish and mezze, plus a sashimi bar, debuted Monday night for dinner. To open Balos, co-owners Stefanos Vouvoudakis and Tom Tsiplakos, who run For Five Coffee Roasters, teamed up with