To get 0 star customers (for unlocking Hipsters), choose for all your rooms "Restrict" and guide all your guests at the reception to the same room while doing a lot of advertising. Most of your guests will be send away and give you 0 stars. Using this you can unlock hipsters in one day!
Rate up if this helped you. :)
 "Innkeeper"){kind=icon}
 "New Star Soccer"){kind=icon}
 "This is the Only Level 3"){kind=icon}
 "Crush The Castle 2 PP"){kind=icon}