There's a lot to criticize here.
Two men are in a Starbucks. When they are asked if they wish to place an order, they say that they will when their two friends show up. They aren't being disruptive or runde. The manager of the Starbucks asks them to leave. They refuse. Again they say that they will order something when their two friends arrive. The manager calls the police.
The police show up and haul the two guys out in handcuffs and take hold them at the police station for more than eight hours.
The manager of that particular Starbucks was wrong. Calling the police was completely avoidable. It's not at all uncommon for people to get a table and wait until the rest of their party shows up before they order.
The friends these two were waiting for did show up.
Arresting these guys, hauling them out in handcuffs and holding them for eight or nine hours is indefensible. The officers did not use proper judgement in this case. They failed to determine what the problem was and resolve the issue.
If the two men were being disruptive there would be a case for making an arrest. I think these two guys will end up being quite wealthy over this incident.
I know that if I was in a Starbucks with one of my buddies and did exactly the same thing, we would not have been arrested and taken into custody.