I am so surprised at the negativity about this idea in this thread. It's a novelty, and it's pretty fun, if you don't like the idea you can just go to the 99% of other bars or restaurants that do allow phones.
I personally like going to these types of places. When you go with a group of people it does change the social dynamic, not being able to ask ChatGPT the answer to a question you don't know off the top of your head, or scroll through your messages as a crutch when there's a lull in the conversation. Everyone is more fully engaged.
It's just a fun novelty, an experience you can't get elsewhere.