Smoke machines can potentially set off smoke alarms, especially if used in close proximity to them or in enclosed spaces with sensitive fire detection systems. The smoke produced by these machines is designed to mimic real smoke, and if it reaches the smoke detectors, it may trigger the alarm. It is important to be cautious and consider the location of smoke machines in relation to smoke alarms. To avoid false alarms, it's advisable to consult with venue managers or event organisers to ensure proper placement and coordination with fire safety measures.