The incident took place last night when the accused- Sunny Seth, Mangal Gulati and Alok Chauhan, in an inebriated condition, assaulted the cashier when they were asked to pay their bill, they said.
The trio also, later, clashed with the bouncers of the pub, when the latter came to the rescue of the cashier.
Later, the accused were handed over to the police.
A case has been registered in theis regard while the further probes are on, police added.