I've thought for a while that restaurants should have kiosks where you swipe your ID/card/whatever and it has a list of your preferences for the waiter/waitress

I've thought for a while that restaurants should have kiosks where you swipe your ID/card/whatever and it has a list of your preferences for the waiter/waitress, such as the fact that I always order water (no lemon!) to drink, so they can improve their service by just bringing that without asking. Add in allergies, favorite orders, and more and you've got a lot of info about your customers to help you make them happier. Plus you get some lock-in because they don't want to have to enter all that info into a new restaurant's system. I think this is the fast-food version, and that more restaurants will follow.