Boasting the largest nitrogen-infused by-the-glass, 5m tap wine bar in the world, with a whopping 250 offered by glass and 650 by the bottle, the Slick Restaurant Group’s Belthazar, hugging the outer edge of the V&A Waterfront’s classy glassed-in food court section, is the place to come for seafood or steak washed down by wine, with a side of people-viewing…