Nitro taps aren't new, but since more and more beer bars have jumped on board, it feels like they're sweeping the city. Case in point: The remodeled Town Hall has three nitro taplines in house. What's the big deal? The reduced CO2 gives beer a flatter, softer feel, making stouts creamier and with less carbonated bite. A nitro beer is thick and smooth with a big head that impresses the senses, and it's not just for dark beers, either — nitro also complements most malty beers. But of course not all beers take well to nitro taps, so brewer beware: A trend is only a winner when used correctly.