Fodor's Expert Review Salón de Juegos Concha 1

Locals know that this nondescript salón de juegos (literally "gambling hall") slings some of the city's best potato omelets, flipped nonstop from 8 am to midnight. The basic potato-and-onion rendition, gloriously gooey in the center, will set you back €2; more deluxe versions (with crab, jamón ibérico, etc.) are a tad pricier. Minors are not allowed entry, but the staff will happily wrap food to go.