According to the Chartered Management Institute (CMI), one in three managers has seen harassment or staff behaving inappropriately at work social events.
The poll of 1,000 managers, seen by the BBC, found that women (33%) were more likely than men (26%) to have witnessed improper conduct.
The poll suggested there was demand for more alcohol-free work events, especially among people aged 16-34. Overall, two in five (42%) respondents said work parties should be organised around activities that do not involve alcohol.
