In the hookahbars, bars, clubs and ect. you often sit and think you'd rather listen to another music. My idea is that the bars create a playlist for their customers, and these people who are there can choose what should be heard next and thus determine the playlist themselves. Here every customer who uses spotify can decide what will run next and is therefore forced to get spotify. There could also be the option to add songs to the playlist if the owner of the playlist allows it.