If restaurants really wanted to insure prompt service, install bells at each table that would silently notify the staff members when a customer presses it. This

If restaurants really wanted to insure prompt service, install bells at each table that would silently notify the staff members when a customer presses it. This is how it's done in Korea, and in every airplane, and it works perfectly. No need for waving and trying to make eye contact on that part, and no need for servers to constantly interrupt your conversation. Not to mention this is also more convenient for the servers as they can monitor a single screen rather than the entire room.