Is it ethical to overpour customers' drinks to develop better customer relations to earn more tips at the expense of company revenues? Are the bar$-$ tenders using the "entitlement mentality" here to justify their self$-$serving actions? Do bartenders have a "right" to take care of their own cups?

If the customer wants or expects an overpour, should the companies allow an overpour to satisfy the customers' wants and desires?