What is a keyboard player, a loose key, or a computer room?

The code names of fraud gangs are usually wine trays, saucers, wedding trays, etc. In the name of making friends, blind dates, etc., they deceive people into going to designated stores to spend high amounts of money, and share the profits with the stores. Those who are responsible for chatting and deceiving people are called "keyboard players", and those who form keyboard gangs are called "computer rooms". There is no organization and they work alone.