Springston Hotel and Bar was robbed at gunpoint just after 10.30pm Thursday.
The armed man entered the hotel and fired two shot in the air before fleeing. A dog unit was deployed at the scene to track the offender, but it was unsuccessful. No one was injured in the robbery.
Owner of Memorys Cafe and Restaurant, Sue Giddens, said she was taking extra security measures from now on.
"If my husband isn't working he will be locking the gate but I'd be considering getting a guard dog or something of that type. I think it would be a good deterrent," she said.
Giddens said she felt vulnerable and slightly isolated working in the area.
Detective Inspector Darryl Sweeney said Canterbury police were concerned about the number of recent aggravated robberies.
Police were working tirelessly to investigate the robberies, he said.
Sweeney urged bar staff to be vigilant at closing time and to take stock of takings every day.