This location has been flagged as "Closed". The Pop-Up Neighborhood: Boulder 1109 Walnut St., 80302 303-442-4924 Website advertisement Related Articles Concerts The Pop-Up, Boulder’s Newest Nightclub, Opens Tonight By Westword Staff advertisement Trending Features The Book of Rotting Christ: Black-Metal Legends Talk Three Decades of Blasphemy By Justin Criado Performing Arts Remembering Ed Baierlein By Juliet Wittman Restaurants Meet New Westword Food Editor Antony Bruno By Antony Bruno Community Voice Opinion: Credit Card Act Could Deepen Inequity By Tony Henderson and Bianka Emerson