Specialist drugs dog Fred visited pubs in Amber Valley as part of a crackdown on crime.
Fred, who is trained to detect drugs on people, visited pubs in Belper, Alfreton, Heanor and Marlpool on Friday, November 4.
Around 14 people were searched under the Misuse of Drugs Act, and two were found to be in possession of suspected cannabis, said police.
PC Roger Brown said: “Overall the evening was a success and we will be looking to run similar initiatives in the future.”
Meanwhile, five people from across Amber Valley have been arrested as part of Operation Rocky — an initiative launched to tackle those involved in serious acquisitive crime.
A stall was set up by police on Belper Market Place at the weekend to tell people about Operation Rocky.
Chf Insp Graham Mclaughlin said: “It is sending out a strong message to offenders that they will be caught and brought to justice.”