Police are looking to speak to a man in connection with an incident at Club Revolution in Glossop last month.
It happened in the early hours of Saturday, October 19, in the club on Railway Street.
Police want to speak to the man seen at the end of the video clip, taken from CCTV footage, below.
They are hoping he can assist with their enquiries into the incident.
Anyone who knows the man or has any other information is asked to send a private message on Facebook to the Derbyshire Constabulary page, send a direct message to @DerPolContact on Twitter, complete the online contact form at www.derbyshire.police.uk/Contact-Us, or call the non-emergency number 101.
The occurrence number 19000563596 should be included in any correspondence.