To update this iconic American favorite, jazz up the bread, consider new spins on sausage, embrace the artisanal and go global with condiments. At F.L.X. Wienery, choices include the Whole Hog ($9.95) with fried onions, bacon, cheese curds, corn relish, fried egg and chipotle mayo. Owner Matthew J. Stipe of Banter in Cleveland features brew-compatible gourmet sausages, while Dog Haus and Pitchoun! both draw on world cuisines.