[Alam]

Kopi kia and customer chase around each other. Heard that outside drink not allowed to be consumed at the coffee shop or else kopi kia will pick a fight with customer. Is this the norm today?

If the coffeeshop let customer consume outside drink, then what’s the point of running a coffeeshop? Charity? Community service? That is the basis of their business. To sell drinks. Why don’t you put yourself in their shoes. You go open a drink stall and let your customer consume outside drinks. Monkey see monkey do. If it is permissible, more and more customer will do the same thing. See how you cover your overheads w less and less drink sales. The rent the utilities and the workers salaries