Right inside Niigata Station's Bandai exit is Ponshu-kan, one of the most entertaining sake experiences in Japan. Insert a 100-yen coin, select one of the nearly 100 sake vending machines representing every brewery in Niigata prefecture, and receive a small ochoko cup and a sample. The system is entirely analogue and thoroughly democratic: local breweries you'd never find in Tokyo sit alongside famous labels like Kubota and Hakkaisan.
The tasting hall also stocks pickled vegetables and local snacks to accompany your rounds. Most visitors end up spending considerably more time (and yen) than intended. Ponshu-kan is open daily and makes an excellent first or last stop in Niigata.