People tap on their phones all the time anyways. Many people don’t mind getting their drinks faster and being able to spend time with the people they actually came to to the bar to see instead of having to jockey for a drink. Having an alert tell you when your drink is ready is efficient. Paying from your phone means you’ll buy more because it’s easy. People who don’t want to use their phones can sit and order at the bar.
Not really. In order to find the wave function you need to measure both particles and compare both sets of superposition info to know that the particles were entangled. The information sharing between Alice and Bob would still have to be through standard means.