YEN Bar 紫艷酒吧 is a bar on the 31st floor of W Taipei in Xinyi District, Taipei City, serving cocktails, beer, and wine. It offers classic and original cocktails, and food from a Chinese restaurant can be ordered as well. Floor-to-ceiling windows look out over Taipei 101 and the city night view, and seats facing Taipei 101 require a reservation one month in advance. The snacks are portioned to accompany drinks and are not enough to order instead of a meal.