Choose your spot
Izakaya come in many shapes and sizes – there are the large chains such as Torikizoku which seem to dot every train station; small, hole-in-the-wall family-run establishments; more upscale establishments (often with private dining rooms); and everything in between.
Each izakaya often specialises in a certain thing, with the exterior usually giving small clues as to what. Plumes of smoky air and the smell of charcoal often means skewers; a sake barrel outside or a ball of cedar wood means a wide selection of nihonshu and snacks to go with it; a painting of a fish somewhere points to good seafood...