I am not surprised seeing as restaurant liter its walls with bitcoin ads but do not accept bitcoin payment, i like the fact that the restaurant manager was sincere, from what i am seeing in the pic shared by the op, those ads are indeed paid for by the company that owns that brand, Op should have seen and known this, the ad banners are owned by a crypto currency business that bought the walls of that restaurant to advertise their business to the customers going in and out of that building.

I've come in contact with vehicle and tricycle owners who have bitcoin ad banners placed in every corner of their vehicle but still, know nothing about bitcoin or cryptocurrency.