The officer, speaking on condition of anonymity, said the decision was "voluntary" and no official order had come from the ministry.
In the capital, where the horrific crime took place on December 16, leading private members' club Gymkhana, where top officials and ministers are often seen, cancelled its party as did the Press Club in the capital.
The five-star Ashoka hotel in New Delhi also closed its popular nightclub, while other bar owners were quoted in the media as saying they were scaling back festivities.
"This New Year is not going to be the same for me and many of my friends," said Ashish Gupta, a 34-year-old chartered accountant who joined protests against the crime on Sunday.
"Our heart goes out to the family of the woman who fought for her life so bravely. The least we can do is show our respect and send out the message that we share their grief," he told AFP.
The 23-year-old paramedical student, was brutally raped on a moving bus in New Delhi on December 16 and assaulted with an iron bar before being thrown from the moving vehicle.
She died of her horrific injuries in a Singapore hospital on Saturday.