I think it's good that they met at a diner to talk. It's a neutral place and the girl probably felt safer there meeting with strangers than a secluded place. All night diners are open and a lot of people don't actually eat dinner but order coffee and maybe dessert and talk in a brightly lit place. They didn't meet at a bar first did they? When those close at 2 a.m., did they then go over to a diner to finish the conversation or did they meet at the diner at 3 a.m.? Either way, I guess they are in a public place and not someone's private place.