as far as I am concerned there should be a strict no-smartphone policy in every café, restaurant, bar, club, cinema, theater, concert etc. that would be amazing. or at least some should do it and i'd only go there.
Well you still need to write down people's contacts etc. A complete ban is impractical and that is even the case for the parties I visit where they are banned. The camera's are taped off but you're free to exchange instagram details etc.
The next morning no way I would remember rollergirl236_berlin lol