The whole point is that the customers are getting something in return. They open their mobile device and look up which venues have people at the moment, so the

The whole point is that the customers are getting something in return. They open their mobile device and look up which venues have people at the moment, so they know where to go. In fact, it sounds like that's the only thing this app does. The only problem is what rdl said--that some customers might think the cameras are actually doing some kind of facial recognition and storing the results (which you wouldn't get from the regular security cameras already at those places) as opposed to just counting how many customers each place has. But then again, customers who aren't going to trust the maker of this app might as well assume that the government is also secretly connecting all street cameras to facial recognition software with huge hard drives to spy on us. Which could be true, but if those people are already willing to go out in public with their faces oncovered, they shouldn't be further afraid of going to these bars.