Feeling like sake or a martini with that sushi? You can now get it when you dine at Yoki Japanese Restaurant and Sushi Bar in Central Square, Cambridge, which opened last summer. The Central Square sushi spot received its liquor license right before Christmas, so the cocktails are flowing. The original Yoki opened in Medford in 2007 and also has a bar (485 Mass. Ave.; Central Square; 617-945-7127).