Most firms believe the Olympics did not disrupt their business, while half say they increased morale among their workforce.
A new study claims two out of five firms allowed staff to watch the Games in the office, saying it helped boost productivity.
The Institute of Leadership and Management (ILM) said its poll of 1,000 managers also revealed that some firms tested new ways of working, such as being based at home or changing start and finishing times.
Most managers disagreed with the view that allowing staff to work remotely would encourage them to "skive", with one in five saying it was a positive move.
Charles Elvin, chief executive of ILM, said: "After such an uplifting London Olympics, it was great to discover that many organisations also felt some benefits.
"It is encouraging to find that businesses took the opportunity to trial flexible working practices and those that did found it far from being 'a skiver's paradise', their people were productive and motivated.
"We hope that organisations continue to offer more flexible working which, when properly managed, is a powerful motivator and helps to attract and retain talent."
Another report by office services firm Regus showed that many people who work "remotely" put in longer hours.
The report said there was a clear link between flexible working and productivity, although one in four of the 2,500 adults questioned said there was still a company culture of having to be seen behind a desk.
