The BJP MP's aide claimed that he had been tricked into attending the event, while the organiser claimed that it was not a nightclub, but a restaurant where no liquor would be served.
The girl tried to immolate herself near the chief minister's residence in Lucknow on Sunday.
Earlier, the Allahabad HC rapped the Uttar Pradesh government saying the law and order machinery and officials were directly under the MLA's influence.
'If prices of everyday consumption don't come down, employment doesn't pick up, 2020 will not be a happy year for anyone but the super rich,' notes Sherna Gandhy.
The Unnao police booked Sengar under various sections of the IPC and provisions of the POCSO Act, but said the CBI will take a decision about his arrest.