With a flavor for the avant garde, a rich appreciation for the appeal of late-night comfort foods, and a modern cut and curvature to its design, Blush (630 State St., 957-1300, blushsb.com) joins the downtown restaurant scene this month. The former location of Zelo has been converted into a sleek lounge space open for dinner, entertainment, cocktails, and twilight snacks. Culinary engineering meets decadent simplicity in dishes such as an artichoke oyster soup with a frothed and slithery pillow of leek foam ($8), and the short rib grilled Midnight Moon cheese sandwich. Choose from a selection of appetizers that include beet carpaccio and lobster mac ‘n’ cheese or entrees of seared diver scallops ($28), crisp potato-wrapped tofu ($22), or pan-seared rib eye ($34). After-hour cocktails are accompanied by options such as baby back ribs, a garlic herb aioli-smeared house burger, and cheese platters. An outdoor patio is being prepped for an early summer opening so patrons can enjoy a warm evening breeze along with live entertainment. Bar and table seating is available, operating extended hours for diners, drinkers, and night owls in a refined and highly social atmosphere.