Helen's has to be one of my favorite places in Wudaokou. They've got decently priced drinks and a varied menu perfect for a student's budget, wi-fi so you can study after class, hookah for shi-sha lovers, and a good playlist that they seem to put together perfectly for those study-afternoons or pre-game nights before heading elsewhere. Not to mention they have different specials for each day of the week i.e. half off hookahs, free beer, lunch specials, etc.