This is the workshop copy of Conquest - Night City, http://steamcommunity.com/sharedfiles/filedetails/?id=1124741330

-Extract the. zip file in your csgo directory. The final .bsp file should be here afer the extract:
:\Program Files (x86)\Steam\SteamApps\common\Counter-Strike Global Offensive\csgo\maps\workshop\1124741330\cp_city_night.bsp
-Open the console in csgo, and start typing "map cp_city_night", and you will see the workshop file there. 