For me it's cafés with "no WiFi here, talk to each other!" signs.
A) I'll probably go elsewhere thanks
B) My best friend likes to sit on his phone anyway because they don't realise mobile data exists.
I just find it so wanky - if I'm going out to spend money on a drink and several pieces of cake then I'm going out to relax. If I want to be on my phone then I will be.