Of all the Swiss cities, Zürich has the liveliest nightlife. The Niederdorf is Zürich's nightlife district, with cut-rate hotels, strip joints, and bars crowding along Marktgasse, which becomes Niederdorfstrasse. On Thursday and weekend nights, the streets flow with a rowdy crowd of club- and bar-hoppers. In Zürich West, the locales are all a shade hipper. In winter, things wind down between