This is how engagement is driven:
Their pitch: "hey, we offer you and your friends a booth to chat in".
They then make sure you're next to some loudmouths in the adjacent booth, to stimulate your convo.
Then they add more people they think are like you, to the other side. Of course they have their own noisy neighbours.
This goes on until your group, which potentially can grow quite large, is literally surrounded.
And at which point the stress and irritation has started to turn people within each cluster against one-another.
Now, once primed, they are ready to be sat next to the next new unsuspecting customer.
End result is a loud, noisy establishment, elevating everyone's stress and anger levels.
Which is great for them as they get paid according to volume, both in terms of clients but the amount of noise they generate.
However for society its a fucking disaster, as these newly angered and abused people spill out onto the streets, carrying their newly created grievances with them.